ENSTROM480BOPERATOR’SMANUAL
AND
FAAAPPROVEDROTORCRAFTFLIGHTMANUAL
REPORTNO.28‐AC‐023
DATED:FEBRUARY9,2001
Revision 24, dated May 2, 2019, applies to the Enstrom 480B
Operator’s and FAA Approved Rotorcraft Flight Manual, dated
February 9, 2001. Incorporate this revision by removing and
insertingthepages
Removepages Insertpages
ithroughiv ithroughiv
viithroughxiv viithroughxiv
INTRO‐3throughINTRO‐6 INTRO‐3throughINTRO‐6
1‐1through1‐4 1‐1through1‐4
1‐16.1through1‐16.2 1‐16.1through1‐16.2
2‐1through2‐2 2‐1through2‐2
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5‐9‐1through5‐9‐4 5‐9‐1through5‐9‐4
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7‐3through7‐4 7‐3through7‐4
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listedbelow.
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ENSTROM 480B OPERATOR'S MANUAL i
LOG OF REVISIONS
Rev.
No.
1 April 10/02 Joseph C. Miess
2 Sept 05/03 Joseph C. Miess
3 Feb 2/04 Joseph C. Miess
4 Sep 9/04 Joseph C. Miess
5 Sep 27/04 Joseph C. Miess
6 Apr 11/05 Joseph C. Miess
7 Jun 6/06 Joseph C. Miess
8 Sep 17/06 Joseph C. Miess
9 Mar 6/07 Joseph C. Miess
10 Apr 11/07 Joseph C. Miess
11 Dec 5/07 Joseph C. Miess
12 Feb 14/08 Joseph C. Miess
13 Apr 23/08 Joseph C. Miess
14 Apr 16/10 Joseph C. Miess
15 Jul 16/10 Joseph C. Miess
16 Sep 20/10 Joseph C. Miess
17 Jan 25/11 Joseph C. Miess
18 Jul 15/11 M. W. Anderson
19 Jan 18/12 Joseph C. Miess
20 Jul 3/12 Joseph C. Miess
21 Jan 14/13 Joseph C. Miess
22 Aug 17/15 Ronald D. McElroy
23 May 19/16 Ronald D. McElroy
24 May 21/19 Ryan Nelson
Date FAA Approved
Approved by the Manager,
Southwest Flight Test Section, AIR-713
Federal Aviation Administration
Ft. Worth, TX
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
ii ENSTROM 480B OPERATOR'S MANUAL
EASA LOG OF REVISIONS
Rev.
No.
1 Sep 28/03 * N/A
2 Sep 28/03 * N/A
3 May 29/05 2005-4677 N/A
4 May 30/05 2005-4682 N/A
5 May 29/05 2005-4678 N/A
6 Jun 1/05 Decision 2004/04/CF N/A
7 Jun 6/06 Decision 2004/04/CF N/A
8 Sep 17/06 Decision 2004/04/CF N/A
9 Aug 2/07 EASA.IM.R.C.01427 N/A
10 Jan 18/08 EASA.IM.R.C.01426 N/A
11 Apr 17/08 EASA.IM.R.C.01442 N/A
12 NOT EASA APPROVED (SUPP. #10, EFIS)
13 NOT EASA APPROVED (SUPP. #10, EFIS)
14 Apr 4/13 EASA 10044309 N/A
15 Mar 7/13 EASA 10043956 N/A
16 Jan 27/14 EASA 10045751 N/A
17 Aug 28/13 FAA/EASA T.I.P. ** G. J. Michalik
18 May 8/14 EASA 10044744 N/A
19 Aug 28/13 FAA/EASA T.I.P. ** G. J. Michalik
20 Oct 10/13 FAA/EASA T.I.P. ** G. J. Michalik
21 Jan 27/14 EASA 10045751 N/A
22 May 1/17 FAA/EASA T.I.P. ** M. Javed
23 May 1/17 FAA/EASA T.I.P. ** M. Javed
24 Jul 11/19 FAA/EASA T.I.P. *** M. Javed
Date EASA Approved
FAA Approval
on Behalf of
EASA
* Article 3, Commission Regulation (EU) 748/2012
** Section 3.2 T.I.P. Revision 5
*** Section 3.5.12 T.I.P. Revision 6
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
ENSTROM 480B OPERATOR'S MANUAL iii
LOG OF SUPPLEMENTS
Sup.
No.
Description Date FAA Approved
1 Cargo Hook Feb 9/01 Joseph C. Miess
2 Snow Shoes Feb 9/01 Joseph C. Miess
3 External Fuel
Filter
4 Baggage Box
Extension
Feb 9/01 Joseph C. Miess
Feb 9/01 Joseph C. Miess
5 Camera Door Feb 9/01 Joseph C. Miess
6 Emergency Floats Sep 5/03 Joseph C. Miess
7 Air Conditioning Sep 9/04 Joseph C. Miess
8 Nose Positioned
Camera Mount
Jun 6/06 Joseph C. Miess
9 Searchlight Jun 6/06 Joseph C. Miess
10 EFIS Feb 14/08 Joseph C. Miess
APPROVED FOR THE MANAGER
CHICAGO AIRCRAFT CERTIFICATION OFFICE
CENTRAL REGION
FEDERAL AVIATION ADMINISTRATION
Rev. 12
Report No. 28-AC-023 Feb 1/08
iv ENSTROM 480B OPERATOR'S MANUAL
EASA LOG OF SUPPLEMENTS
Sup.
No.
Description Date
1 Cargo Hook Sep 28/03 * N/A
2 Snow Shoes Sep 28/03 * N/A
EASA
Approved
FAA
Approval
on Behalf
of EASA
External Fuel
3
4
5 Camera Door Sep 28/03 * N/A
6
7
8
9 Searchlight Jun 6/06
10 EFIS NOT APPROVED
Filter
Baggage Box
Extension
Emergency
Floats
Air
Conditioning
Nose
Positioned
Camera
Mount
Sep 28/03 * N/A
Sep 28/03 * N/A
May 29/05 2005-4677 N/A
May 30/05 2005-4682 N/A
Jun 6/06
Decision
2004/04/CF
Decision
2004/04/CF
N/A
N/A
* Article 3, Commission Regulation (EU) 748/2012
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
ENSTROM 480B OPERATOR'S MANUAL vii
LIST OF EFFECTIVE PAGES
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ii May 2/19
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x May 2/19
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INTRO-1 Feb 9/01
INTRO-2 Feb 9/01
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FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
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FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
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Report No. 28-AC-023 May 2/19
ENSTROM 480B OPERATOR'S MANUAL xiii
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Report No. 28-AC-023 May 2/19
xiv ENSTROM 480B OPERATOR'S MANUAL
INTENTIONALLY LEFT BLANK
Rev. 20
Report No. 28-AC-023 Jul 3/12
ENSTROM 480B OPERATOR’S MANUAL INTRO-3
INTRODUCTION
INTRO-1. General
This manual contains the operating instructions,
procedures and limitations for the Enstrom 480B
helicopter. The manual is divided into two basic parts, the
FAA approved Rotorcraft Flight Manual (RFM) and
Supplemental Data Provided by The Enstrom Helicopter
Corporation (Enstrom). Chapters 1, 2, 3, 4, and 5 make
up the FAA approved RFM. It is required by Federal
Regulations that this manual be carried in the helicopter
at all times.
Chapter 5, Optional Equipment Supplements, contains the
optional equipment supplements incorporated into this
basic RFM. Refer to the Enstrom Helicopter Corporation
web site and the Technical Support page for a listing of
other approved Enstrom 480B Optional Equipment
Supplements not contained in this basic RFM. The pilot is
responsible for determining if other additional optional
equipment supplements are to be carried in the helicopter.
INTRO-2. Warnings, Cautions, and Notes
Warnings, Cautions, and Notes emphasize important and
critical instructions and are used for the following
conditions:
WARNING
An operating procedure, practice, etc. which,
if not correctly followed, could result in
personal injury or loss of life.
CAUTION
An operating procedure, practice, etc. which,
if not strictly observed, could result in damage
to or destruction of equipment.
Rev. 24
Report No. 28-AC-023 May 2/19
INTRO-4 ENSTROM 480B OPERATOR’S MANUAL
NOTE
An operating procedure, practice, etc., which
is essential and requires additional
information.
INTRO-3. Description
This manual contains the best operating instructions and
procedures for the 480B helicopter under most
circumstances. The observance of limitations,
performance and weight and balance data provided is
mandatory. The observance of procedures is mandatory
except when modification is required because of multiple
emergencies, adverse weather, terrain, etc. Your flying
experience is recognized, and therefore, basic flight
principles are not included. THIS MANUAL SHALL BE
CARRIED IN THE HELICOPTER AT ALL TIMES.
INTRO-4. Table of Contents
The table of contents lists every titled paragraph, figure,
and table contained in this manual.
INTRO-5. Reporting of Errors
Every effort is made to keep this publication current and
error free. However, we cannot correct an error unless we
know of its existence. You are encouraged to report errors,
omissions, and recommendations for improving this
publication by contacting The Enstrom Helicopter
Corporation.
INTRO-6. Explanation of Change Symbols
Except as noted below, changes to the text and tables,
including new material on added pages, are indicated by a
vertical line in the margin. The vertical line will extend
close to the entire area of the material affected. Symbols
show current changes only. Change symbols are not
utilized to indicate changes in the following:
Rev. 24
Report No. 28-AC-023 May 2/19
ENSTROM 480B OPERATOR’S MANUAL INTRO-5
1. Indexes, figures, and tabular data where the
change cannot be readily identified.
2. Blank space resulting from the deletion of text,
illustration, or a table.
3. Correction of minor errors, such as spelling,
punctuation, relocation of material, etc. unless such
correction changes the meaning of the material.
INTRO-7. Use of Words, Shall, Should, and May
Within this technical manual, the word "shall" is used to
indicate a mandatory requirement. The word "should" is
used to indicate a nonmandatory but preferred method of
accomplishment. The word "may" is used to indicate an
acceptable method of accomplishment.
Rev. 24
Report No. 28-AC-023 May 2/19
INTRO-6 ENSTROM 480B OPERATOR’S MANUAL
INTRO-8. Definitions of Abbreviations
Table INTRO-1 provides definitions for abbreviations used
in this manual. The same abbreviation applies for either
singular or plural applications.
TABLE INTRO-1. LIST OF ABBREVIATIONS
ABBREVIATION DEFINITION
ABS Absolute
AGL Above Ground Level
AH Amp Hour
ALT Altitude
B.L. Butt Line
C Celsius
CAS Calibrated Airspeed
CG Center of Gravity
C.L. Center Line
CONF Configuration
CONT Continuous
END Endurance
F Fahrenheit
FAA Federal Aviation
Administration
FLT Flight
FPM Feet per Minute
F.S. Fuselage Station
FT Foot
FT/MIN Feet per Minute
FWD Forward
Report No. 28-AC-023 Feb 9/01
ENSTROM 480B OPERATOR'S MANUAL 1-1
CHAPTER 1. OPERATING LIMITATIONS
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE
Table of Contents ....................... 1-1
Section I Introduction ............................... 1-3
Paragraph 1-1 Purpose ...................................... 1-3
1-2 General ...................................... 1-3
1-3 Operational Limits ...................... 1-3
Section II General ...................................... 1-3
Paragraph 1-4 Kinds of Operation ..................... 1-3
1-5 Minimum Crew Requirements .... 1-4
Section III Helicopter & System Limits ........ 1-5
Paragraph 1-6 Instrument Markings ................. 1-5
1-7 Rotor Limitations ....................... 1-5
1-8 Transmission Limits ................... 1-5
1-9 Engine Limits ............................. 1-6
1-10 Starter Limits ............................. 1-9
Section IV Operation Limits ...................... 1-17
Paragraph 1-11 Airspeed Limits ........................ 1-17
1-12 Altitude Limits ......................... 1-18
1-13 Load Limits .............................. 1-23
1-14 Maneuvers ............................... 1-23
1-15 Environmental ......................... 1-24
1-16 Restrictions in Use of
Anti-torque Pedals .................... 1-25
1-17 Placards ................................... 1-25
LIST OF FIGURES
FIGURE NO. DESCRIPTION PAGE
1-1 Instrument Markings ........................... 1-11
1-2 Maximum Allowable Torque and N
.. 1-16.2
2
1-3 Airspeed Operating Limits ................... 1-19
1-4 V
1-5 V
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
Envelopes ...................................... 1-22
NE
Placards ........................................ 1-27
NE
1-2 ENSTROM 480B OPERATOR'S MANUAL
LIST OF TABLES
TABLE NO. DESCRIPTION PAGE
1-1 Kinds of Operation Equipment List .........1-4
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
ENSTROM 480B OPERATOR'S MANUAL 1-3
CHAPTER 1
OPERATING LIMITATIONS
SECTION I. INTRODUCTION
1-1. Purpose
1. This chapter includes operating limitations and
restrictions that must be observed during ground and flight
operations.
1-2. General
1. The operating limitations set forth in this chapter
are the direct results of design analysis and flight tests.
Compliance with these limits will allow the pilot to derive
maximum utility from the helicopter.
1-3. Operational Limits
1. Anytime an operational limit is exceeded an
appropriate entry shall be made in the aircraft log book.
The entry shall state what limit or limits were exceeded, and
the range and time beyond the limits including any
additional data that would aid maintenance personnel in
the proper disposition of the entry and inspection of the
aircraft.
SECTION II. GENERAL
1-4. Kinds of Operation
1. This aircraft is certified in normal category for day
and night VFR operation in non-icing conditions when the
appropriate instruments and equipment required by the
airworthiness and/or operating rules are installed and
approved and are in operable condition. Table 1-1 lists the
equipment that is required to be operable for typical VFR
operations. Additional equipment may be required by
operational regulations. The pilot is responsible for
determining if there are additional requirements.
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
1-4 ENSTROM 480B OPERATOR'S MANUAL
Table 1-1. Kinds of Operation Equipment List
System and/or
Component
Airspeed Indicator 1 1
Altimeter 1 1
AMP/Volt 1 1
Clock 0 0
Compass 1 1
Dual Tachometer 1 1
Engine Oil Temperature/
Pressure
Fuel Quantity Indicator 1 1
N1 Indicator 1 1
OAT 1 1
Torque Indicator 1 1
TOT Indicator 1 1
Transmission Oil
Temperature
Anticollision Lights 0 0
Instrument Lights 0 1
Landing Light 0 1
Position Lights 0 1
Switch and Circuit Breaker
Panel Lighting
VFR DAY
VFR NIGHT
NOTES
1 1
1 1
0 1
1-5. Minimum Crew Requirements
1. The minimum crew is one pilot. Solo from left seat
only.
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
ENSTROM 480B OPERATOR'S MANUAL 1-16.1
l5 l0 5 0
AMP
l5
30
35
DC
20
25
20
VOLTS
X l0
150 Amp System Indicator
110 Amp System Indicator
DUAL VOLT/AMMETER
VOLT
32 Vdc Red Radial Maximum Voltage (S/N 5134 and sub.)
AMMETER
150 Amps
110 Amps
Red Radial Maximum Current (S/N 5134 and sub.)
Maximum Current (Prior to S/N 5134)
Sheet 7 of 7
Figure 1-1. Instrument Markings
FAA Approved: Jul 16/10 Rev. 15
Report No. 28-AC-023 Jul 12/10
1-16.2 ENSTROM 480B OPERATOR'S MANUAL
Figure 1-2. Maximum Allowable Torque and N
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
2
ENSTROM 480B OPERATOR'S MANUAL 2-1
CHAPTER 2. NORMAL PROCEDURES
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE
Table of Contents ....................... 2-1
Section I Flight Planning ........................... 2-3
Paragraph 2-1 Flight Planning ........................... 2-3
2-2 Operating Limits ........................ 2-3
2-3 Weight, Balance and Loading ..... 2-3
2-4 Performance ............................... 2-3
Section II Operating Procedures and
Maneuvers ................................. 2-4
Paragraph 2-5 General ...................................... 2-4
2-6 Checklist .................................... 2-4
2-7 Checks ....................................... 2-4
2-8 Before Preflight Check ................ 2-4
2-8.1 Preflight Check –
Fuel Management ....................... 2-5
2-9 Preflight Check – Exterior Check 2-6
2-10 Cabin Left Side ....................... 2-6
2-11 Aft Fuselage Left Side .............. 2-7
2-12 Tailcone Left Side .................... 2-9
2-13 Tailcone Right Side ................. 2-9
2-14 Aft Fuselage Right Side ......... 2-10
2-15 Fuselage Top Area ................. 2-12
2-16 Cabin Right Side ................... 2-12
2-17 Cabin Left Side ..................... 2-13
2-18 Before Starting Engine ............. 2-13
2-19 Starting Engine ........................ 2-16
2-20 Engine Runup .......................... 2-19
2-21 Takeoff to Hover ....................... 2-20
2-22 Hovering Turns ........................ 2-20
2-23 Sideward and Rearward
Hovering Flight ......................... 2-21
2-24 Hover Taxi ................................ 2-21
2-25 Cyclic Trim ............................... 2-21
2-26 Hover Check ............................. 2-21
2-27 Before Takeoff .......................... 2-22
2-28 Normal Takeoff ......................... 2-23
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
2-2 ENSTROM 480B OPERATOR'S MANUAL
CHAPTER 2. NORMAL PROCEDURES
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE
2-29 Maximum Power Takeoff
Profiles ...................................... 2-24
2-30 Crosswind Takeoff ..................... 2-26
2-31 Climb ........................................ 2-26
2-32 Cruise ....................................... 2-26
2-33 Descent ..................................... 2-26
2-34 Before Landing .......................... 2-26
2-35 Approach and Landing .............. 2-27
2-36 Landing From A Hover .............. 2-28
2-37 After Landing ............................ 2-28
2-38 Engine Shutdown ...................... 2-29
2-39 Before Leaving The Helicopter ... 2-30
2-40 Night Flight ............................... 2-30
Section III Passenger Briefing .................... 2-31
Paragraph 2-41 Passenger Briefing .................... 2-31
Section IV Adverse Environmental
Conditions ................................ 2-32
Paragraph 2-42 Cold Weather Operation ............ 2-32
2-43 Cold Weather Inspection ........... 2-32
2-44 Cold Weather Checks ................ 2-34
2-45 Snow ......................................... 2-36
2-46 Desert and Hot Weather
Operations ................................ 2-39
2-47 Icing Conditions ........................ 2-40
2-48 High Altitude Operations ........... 2-41
2-49 High Altitude Cold Weather
Operation .................................. 2-42
2-50 Deceleration Check ................... 2-42
LIST OF FIGURES
FIGURE NO. DESCRIPTION PAGE
2-1 Exterior Check ......................................2-6
FAA Approved: Apr 16/10 Rev. 14
Report No. 28-AC-023 Apr 16/10
ENSTROM 480B OPERATOR'S MANUAL 2-15
20. Check the TORQUE, ENGINE OIL TEMP/PRESS,
TRANSMISSION OIL TEMP, TOT, N
, VOLT/AMP, and FUEL
1
QUANTITY indicator status during and after the power-on
self-tests (para. 7-28.9).
(O) 21. Attitude indicator(s) – Reset by pulling the Fast
Erect knob.
22. Warning lights – Check for the illumination of the
ROTOR RPM and ENGINE OUT warning lights.
23. Caution panel – Test. Check that the MASTER
CAUTION light, FIRE WARNING light, and all of the
segments in the segmented caution panel illuminate.
Release the switch and check that all lights go out except
the ENGINE OUT and ROTOR RPM warning lights and DC
GEN and ENG OIL PRESS caution lights.
24. Check the temperature and select correct
/C.G. placard.
V
NE
NOTE
is based on a combination of pressure
V
NE
altitude and temperature at flight conditions
and take-off gross weight and takeoff c.g.
Proper determination of take-off gross weight
and c.g. is required to determine the
appropriate V
envelope.
NE
25. Clock – Checked and set.
(O) 26. Digital Fuel Quantity – Check. Enter new fuel
quantity, if required, as follows:
a. Determine total fuel quantity on board from the
fuel quantity gauge and the fueling records.
b. Press the center toggle switch to the left (fuel
remaining) position. If it agrees with the quantity
on board, release the toggle switch and press
"ENTER".
FAA Approved: May 19/16 Rev. 23
Report No. 28-AC-023 Apr 28/16
2-16 ENSTROM 480B OPERATOR'S MANUAL
c. If it reads less than the quantity on board, hold the
center toggle switch to the left and simultaneously
press the "ENTER" button and hold. Fuel quantity
will increment.
d. Release all switches when the digital display reads
the correct amount, then press "ENTER".
e. If it reads more than the quantity on board, hold
the center switch to the right and press the
"ENTER" button and hold both. The fuel quantity
will decrement.
f. Release all switches when the digital display reads
the correct amount. Then press "ENTER".
27. Engine out/low rotor audio – Test by releasing the
collective friction, raising the collective until both audio
alarms are heard, then lowering the collective to full down
and resetting the collective friction.
28. Throttle – Check closed.
29. Cyclic trim – Check by displacing the cyclic trim
switch coolie hat each direction - forward, aft, left, and right
- for a few seconds to determine that the motors run the
proper direction and reverse properly. Then center the
cyclic.
30. Anticollision lights (STRB LTS or BCN LTS) – ON.
(N) 31. POS LTS switch – ON as required.
2-19. Starting Engine
1. Exhaust area – clear, free of combustible foliage.
2. Rotor blades – Check clear and untied.
3. Verify TOT.
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
ENSTROM 480B OPERATOR'S MANUAL 2-17
NOTE
If the TOT is above 150°C, the pilot may elect
to motor the engine with the throttle off until
the TOT is below 150°C, prior to beginning this
engine start sequence. If the engine is equipped
with a start counter, this will count as a
“START” but can be deducted in the engine
records in accordance with the Rolls-Royce
250-C20 Series Operation and Maintenance
Manual.
4. Engine – Start as follows:
a. Starter switch – Press and hold. Simultaneously
start the clock stop watch function to time the
start to 58% N
.
1
b. TOT – Below 150°C. Motor engine as necessary to
lower TOT below 150°C.
c. Throttle – Open quickly to the idle stop after the N
RPM passes through 12-15%. Observe
recommended minimum N
speeds as noted below:
1
NOTE
If there is a delay of more than 3 seconds
between opening the throttle and light off of
the engine, the operator should return the
throttle to the OFF position and motor the
engine for 30 seconds to clear the fuel from the
burner can.
OAT (Outside Air Temp)
Minimum N1 Speed
7°C and above 15%
7°C down to -18°C 13%
-18°C and below 12%
NOTE
It is not necessary to wait for the N
to peak.
1
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
1
2-18 ENSTROM 480B OPERATOR'S MANUAL
d. Monitor TOT for over temperature conditions.
Refer to Chapter 1 for limitations.
e. Starter switch – Release at 58% N
. Note elapsed
1
time for start. Observe the starter limitations
prescribed in Chapter 1 and the average engine
starting time shown in Chapter 9.
f. Engine oil pressure – Check.
g. Gas producer – Check 59-65% N
h. N
– Check stabilized.
2
.
1
CAUTION
If the main rotor is not moving when 30% N1 is
reached, abort the start and make an entry in
the aircraft log book.
5. Ground power unit – Disconnect (if used).
CAUTION
Check that the ground power unit is
disconnected prior to turning the Generator
switch ON.
6. MAIN GEN switch – ON, check DC GEN caution
light out, and Volt/Ammeter indicates a load. Wait until
the ammeter load decreases below the redline before
turning any other electrical system on.
7. Avionics master switch – ON when the ammeter
indicates less than 50 amps.
FAA Approved: Apr 16/10 Rev. 14
Report No. 28-AC-023 Apr 16/10
ENSTROM 480B OPERATOR'S MANUAL 5-9-1
CHAPTER 5
SUPPLEMENT 9
SEARCHLIGHT
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE
Table of Contents .................... 5-9-1
Section I General ................................... 5-9-3
Paragraph 5-9-1 Introduction ............................ 5-9-3
5-9-2 Description ............................. 5-9-3
Section II Operating Limitations .............. 5-9-4
Paragraph 5-9-3 General ................................... 5-9-4
5-9-4 Placards .................................. 5-9-4
Section III Normal Procedures .................. 5-9-5
Paragraph 5-9-5 Preflight Check ........................ 5-9-5
5-9-6 Searchlight Operation ............. 5-9-6
5-9-7 Searchlight/Gimbal Assembly
Removal .................................. 5-9-7
5-9-8 Searchlight/Gimbal Assembly
Installation .............................. 5-9-8
5-9-9 Control Box Removal ............... 5-9-8
5-9-10 Control Box Installation .......... 5-9-8
Section IV Emergency Procedures ............ 5-9-9
Paragraph 5-9-11 Electrical System Failure ......... 5-9-9
5-9-12 Emergency Pop-Out Float
Deployment ............................. 5-9-9
Section V Performance .......................... 5-9-11
Paragraph 5-9-13 General ................................. 5-9-11
Section VI Weight and Balance .............. 5-9-12
Paragraph 5-9-14 General ................................. 5-9-12
5-9-15 Lateral Offset Moment ........... 5-9-13
FAA Approved: Jun 6/06 Rev. 7
Report No. 28-AC-023 May 22/06
5-9-2 ENSTROM 480B OPERATOR'S MANUAL
LIST OF TABLES
TABLE
NO. DESCRIPTION PAGE
5-9-1 Weight and Balance Information –
(Standard Kit) ................................... 5-9-12
5-9-2 Weight and Balance Information –
(Pop-Out Floats) ............................... 5-9-12
5-9-3 Lateral Offset Moment Information –
(Standard Kit) ................................... 5-9-13
5-9-4 Lateral Offset Moment Information –
(Pop-Out Floats) ............................... 5-9-13
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
ENSTROM 480B OPERATOR'S MANUAL 5-9-3
SUPPLEMENT 7
SEARCHLIGHT
SECTION I. GENERAL
5-9-1. Introduction
1. This supplement must be attached to the Basic
Flight Manual when the Searchlight Kit, P/N 4220056 is
installed on the aircraft. Operation in compliance with
Chapter 1, Operating Limitations, of the Basic Flight
Manual is mandatory except as modified by this
supplement. Other approved sections and supplemental
data are recommended procedures.
5-9-2. Description
1. The Searchlight Kit, P/N 4220056, provides for
installation of a SpectroLab, Inc. SX-5 Starburst®
Searchlight. Two mounting options allow for either a
standard mount or an elevated mount. The elevated mount
must be used if the aircraft is equipped with the Emergency
Floats Kit, P/N 4220091.
2. The Searchlight Kit consists of a tubular mount
that attaches to the right side of the landing gear assembly
aft crosstube and the associated airframe wiring
installation. The SX-5 Starburst® system consists of the
searchlight and gimbal assembly, junction box assembly,
control box assembly, and associated wiring harnesses. The
electrical power circuit for the searchlight is protected by a
40 amp voltage limiter (fuse) located in the keel assembly
under the cabin floor.
NOTE
This flight manual supplement provides
general operating procedures for the SX-5
Starburst® Searchlight. Always refer to the
latest revision of the SX-5 Starburst®
Searchlight User’s Manual (Doc# 031718) for
specific operating procedures.
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
5-9-4 ENSTROM 480B OPERATOR'S MANUAL
SECTION II. OPERATING LIMITATIONS
5-9-3. General
1. Same as Basic Flight Manual.
5-9-4. Placards
1. The following placard must be installed in view of
the aircraft crew (SpectroLab P/N 031751):
MONITOR ELECTRICAL LOADMETER WITH SEARCHLIGHT
ON. REDUCE ELECTRICAL LOAD AS NEEDED TO REMAIN
WITHIN CONTINUOUS OPERATING LIMITS.
MAGNETIC COMPASS UNRELIABLE WHEN SEARCHLIGHT IS
OPERATING.
TURN OFF SEARCHLIGHT WHEN ENTERING CLOUDS OR
FOG. DO NOT OPERATE SEARCHLIGHT BELOW 50 FEET.
RETURN SEARCHLIGHT TO HORIZONTAL BEFORE LANDING
2. The following placard must be installed in view of
the aircraft crew if the aircraft is equipped with the
emergency pop-out floats:
WARNING
TURN SEARCHLIGHT OFF
BEFORE DEPLOYING EMERGENCY
POP-OUT FLOATS
FAA Approved: Jun 6/06 Rev. 7
Report No. 28-AC-023 May 22/06
ENSTROM 480B OPERATOR'S MANUAL 5-9-11
SECTION V. PERFORMANCE
5-9-13. General
1. Same as Basic Flight Manual.
FAA Approved: Jun 6/06 Rev. 7
Report No. 28-AC-023 May 22/06
5-9-12 ENSTROM 480B OPERATOR'S MANUAL
SECTION VI. WEIGHT AND BALANCE
5-9-14. General
1. A new weight and balance should be recalculated
per the instructions in Chapter 6 of the Basic Flight Manual
using the information listed below.
Table 5-9-1. Weight and Balance Information
(Standard Kit)
Equipment
Searchlight Mount with
Weight
(lbs)
Arm
(in)
5.4 170.1 918.5
Moment
(in-lbs)
Electrical Harness
Junction Box**
Searchlight/Gimbal
6.3 222.0 1398.6
21.5 171.3 3683.0
Assembly
Total* 33.2 180.7 6000.1
Table 5-9-2. Weight and Balance Information
(Elevated Kit)
Equipment
Searchlight Mount with
Weight
(lbs)
Arm
(in)
7.8 168.8 1316.6
Moment
(in-lbs)
Electrical Harness
Junction Box**
Searchlight/Gimbal
6.3 222.0 1398.6
21.5 171.3 3683.0
Assembly
Total* 35.6 179.7 6398.2
* Total does not include control box and cable (1.5 lbs)
or non-removable portion of electrical harness.
** Standard location; location may vary depending on
other optional equipment installations.
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
ENSTROM 480B OPERATOR'S MANUAL 5-9-13
5-9-15. Lateral Offset Moment
1. Use the lateral offset moment information in
Tables 5-9-3 or 5-9-4 when computing the lateral center of
gravity for the aircraft.
Table 5-9-3. Lateral Offset Moment Information
(Standard Kit)
Equipment
Searchlight Mount with Electrical
Lateral Offset Moment
(in-lbs)
187.9
Harness
Junction Box**
Searchlight/Gimbal Assembly
55.4
1057.8
Total* 1301.1
Table 5-9-4. Lateral Offset Moment Information
(Elevated Kit)
Equipment
Searchlight Mount with Electrical
Lateral Offset Moment
(in-lbs)
262.9
Harness
Junction Box**
Searchlight/Gimbal Assembly
55.4
1057.8
Total* 1376.1
* Total does not include control box and cable (1.5 lbs)
or non-removable portion of electrical harness.
** Standard location; location may vary depending on
other optional equipment installations.
FAA Approved: May 21/19 Rev. 24
Report No. 28-AC-023 May 2/19
5-9-14 ENSTROM 480B OPERATOR'S MANUAL
INTENTIONALLY LEFT BLANK
FAA Approved: Jun 6/06 Rev. 7
Report No. 28-AC-023 May 22/06
ENSTROM 480B OPERATOR'S MANUAL 7-3
CHAPTER 7 HELICOPTER AND SYSTEMS
DESCRIPTION AND OPERATION
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE
Section VIII Heating and Ventilation ............ 7-54
Paragraph 7-53 Bleed Air Heating and
Defroster System ...................... 7-54
7-54 Windshield Demister ................ 7-54
7-55 Ventilation System ................... 7-55
Section IX Electrical Power Supply &
Distribution System ................. 7-56
Paragraph 7-56 General .................................... 7-56
7-57 Battery ..................................... 7-57
7-58 External Power Receptacle ........ 7-57
7-59 Generator ................................. 7-58
7-60 Generator Caution Light ........... 7-59
7-61 Controls and Indicators ............ 7-59
Section X Lighting .................................... 7-63
Paragraph 7-62 Position Lights ......................... 7-63
7-63 Anticollision Lights ................... 7-63
7-64 Landing Light ........................... 7-63
7-65 Instrument Lights .................... 7-64
7-66 Cabin Dome Light .................... 7-64
7-67 Map/Utility Light ..................... 7-65
Section XI Flight Instruments ................... 7-66
Paragraph 7-68 Airspeed Indicator .................... 7-66
7-69 Optional Pitot Heater ................ 7-66
7-70 Altimeter and Encoder .............. 7-66
7-71 Attitude Indicator ..................... 7-67
7-72 Instantaneous Vertical
Velocity Indicators .................... 7-67
7-73 Turn and Slip Indicator ............ 7-67
7-74 Outside Air Temperature
Indicator .................................. 7-68
7-75 Magnetic Compass ................... 7-68
7-75.1 Alternate Static Air Source ....... 7-68
Rev. 15
Report No. 28-AC-023 Jul 12/10
7-4 ENSTROM 480B OPERATOR'S MANUAL
CHAPTER 7 HELICOPTER AND SYSTEMS
DESCRIPTION AND OPERATION
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE
Section XII Caution & Warning Systems ..... 7-69
Paragraph 7-76 Caution & Warning Systems ..... 7-69
Section XIII Miscellaneous Systems ............. 7-75
Paragraph 7-77 Ignition Lock Switch .................. 7-75
7-78 Hour Meter ............................... 7-75
7-79 Start Counter ............................ 7-75
7-80 Power Sockets ........................... 7-76
7-81 Headset Jacks ........................... 7-76
LIST OF FIGURES
FIGURE NO. DESCRIPTION PAGE
7-1 General Arrangement Diagram ...............7-9
7-2 Principle Dimensions Diagram ............. 7-11
7-3 Instrument Panel ................................. 7-12
7-4 Pedestal Panel ...................................... 7-14
7-5 Slider Control Panel ............................. 7-20
7-6 Fuel System Diagram ........................... 7-30
7-7 Collective Control Box .......................... 7-34
7-8 Collective Friction System .................... 7-36
7-9 Cyclic Grip Switches ............................. 7-39
7-10 Power Train .......................................... 7-47
7-10.1 N1-N2-NR-TOT Switch .......................... 7-62
7-11 External Power Receptacle ................. 7-62.1
7-12 Fuse Panel – 110 Amp System ........... 7-62.2
7-12.1 Fuse Panel – 150 Amp System ........... 7-62.2
7-13 Warning and Caution Lights ................. 7-71
Rev. 24
Report No. 28-AC-023 May 2/19
ENSTROM 480B OPERATOR'S MANUAL 7-59
7-60. Generator Caution Light
1. Anytime that the DC generator output voltage is
less than the battery voltage or the generator is OFF or
otherwise disconnected from the aircraft main bus, the
generator caution light, marked DC GEN on the caution
panel, will illuminate.
7-61. Controls and Indicators
1. Volt-Ammeter. The dual indicating volt-ammeter
(DC), located on the instrument panel, is a microprocessor
based indicator and indicates the main bus voltage (VOLT)
and the current load (AMP) being used. The indicator’s
microprocessor performs a power-on self-test when power
is connected to the indicator and also continuously
monitors “sensor reasonableness” (Refer to para. 7-28.9).
The microprocessor in the indicator will illuminate the LED
RED when the maximum operating limits are exceeded
(Refer to para. 7-76.2.c). The indicator is powered by the
aircraft 28-volt electrical system through the VOLT/AMP
circuit breaker.
2. Battery Switch. The BATT switch is located at the
top of the center pedestal panel. Battery electrical power is
supplied to the helicopter's electrical system when the
switch is in the ON position. When the switch is in the ON
position, it closes the circuit to the battery relay coil and
battery power is then connected to the main electrical bus.
When the switch is placed in the OFF position, it opens the
circuit to the battery relay coil and battery power is
disconnected from the main electrical bus.
3. Generator Switch. The generator switch, labeled
MAIN GEN, is located at the top of the center pedestal panel
to the left of the battery switch. In the ON position the
generator field is energized through the generator control
unit and 28-volt generator power is supplied through the
generator relay to the main electrical system bus. In the
OFF position, the generator is disconnected from the main
electrical bus.
Rev. 15
Report No. 28-AC-023 Jul 12/10
7-60 ENSTROM 480B OPERATOR'S MANUAL
NOTE
On S/N’s 5039-5076 and 5078-5084, the
generator switch will be automatically tripped
OFF if the engine starter button is pushed. It
must be placed ON after the engine start is
complete. On S/N’s 5077, 5085 and subs., the
generator switch must manually be cycled to
RESET then ON if the starter button is pushed
with the generator switch ON.
4. N1-N2-NR-TOT Switch. The N1-N2-NR-TOT
switch (Figure 7-10.1), located at the top right side of the
instrument panel, controls the emergency electrical power
circuits that provide power to the gas producer (N
tachometer, Dual (N
) tachometer, and the TOT
2/NR
)
1
indicator incase of a complete electrical system failure.
Emergency power is supplied to the indicators by moving
the switch from the BUS position to the BATT position. The
emergency electrical power circuits are protected by the N1,
N2, NR, and TOT circuit breakers located on the right side
of the back wall in the engine compartment (Figure 7-11).
A yellow LED, located next to the switch, illuminates when
the switch is in the BATT position.
NOTE
Early 480B’s are equipped with a gas producer
tachometer which does not require aircraft
electrical power for operation. The emergency
electrical power switch in these aircraft is
labeled N2-NR-TOT.
5. Avionics Master Switch. The AVI MSTR switch
(Figure 7-4), located at the top of the center pedestal panel,
controls and provides electrical power to the avionics
bus. Equipment such as GPS/Nav/Com, transponder,
CDI, HSI, or EHSI, or other avionic units are typically
connected to the avionics bus. Switching the AVI MSTR to
the OFF position disconnects electrical power to the
avionics bus.
Rev. 24
Report No. 28-AC-023 May 2/19
ENSTROM 480B OPERATOR'S MANUAL 7-61
6. Circuit breakers and circuit breaker switches. The
primary circuit breakers and circuit breaker switches for
the aircraft are located either on the center pedestal panel
or the instrument panel. Each individual circuit
breaker/switch is labeled for the particular electrical circuit
protected. In the event a circuit becomes overloaded, the
circuit breaker protecting the circuit will pop out or the
circuit breaker switch will release to the OFF position. The
circuit may be reactivated by pushing the circuit breaker
button back in or by cycling the circuit breaker switch
thereby resetting the circuit breaker. Circuits for devices
using direct power feed from the battery are protected by
circuit breakers located directly beneath the external power
receptacle on the right side of the backwall in the engine
area.
7. Fuses. Nonessential equipment electrical circuits
not protected by circuit breakers are fuse protected. The
fuses are located on the left side of the center pedestal
(Figure 7-12). For aircraft S/N 5134 and subsequent, the
fuse panel is an option.
8. Current Limiters. The current limiter, located on
the right side of the backwall in the engine compartment, is
a non-resettable fuse that protects the main electrical bus
in case of a direct short to ground. Optional current limiters
are installed as needed for additional electrical circuits.
Rev. 24
Report No. 28-AC-023 May 2/19
7-62 ENSTROM 480B OPERATOR'S MANUAL
Figure 7-10.1. N1-N2-NR-TOT Switch
Rev. 1
Report No. 28-AC-023 Apr 10/02
ENSTROM 480B OPERATOR'S MANUAL 7-75
SECTION XIII. MISCELLANEOUS SYSTEMS
7-77. Ignition Lock Switch
1. The ignition lock switch, located on the left side of
the center pedestal (Figure 7-12), must be in the ON
(horizontal) position for engine start-up. The switch is
wired in the engine start circuit between the start relay
circuit breaker and the starter button. The switch must be
in the OFF (vertical) position to remove the key.
7-78. Hour Meter
1. The hour meter, located on the left side of the
center pedestal (Figure 7-12), records engine operating
time. The hour meter is powered by the aircraft 28-volt
electrical system through the HR METER circuit breaker
and is controlled by an oil pressure switch mounted in
parallel with the engine oil pressure transducer. On aircraft
prior to S/N 5134, the hour meter circuit is protected by
the HR METER fuse. Starting with aircraft S/N 5048, a
collective microswitch is incorporated into the hour meter
system. The hour meter in aircraft S/N 5048 and
subsequent records flight time.
7-79. Start Counter
1. The start counter, located on the left side of the
center pedestal, records when electrical power is supplied
to the engine ignition exciter. Start count information is
required for tracking life limited components of the engine.
The start counter is powered by the aircraft 28-volt
electrical system through the IGN EXCITE circuit breaker.
NOTE
Prior to serial number 5048, the start counter
is located next to the ignition exciter on the
engine.
Rev. 15
Report No. 28-AC-023 Jul 12/10
7-76 ENSTROM 480B OPERATOR'S MANUAL
7-80. Power Sockets
1. The aircraft may be equipped with optional power
sockets. The power sockets provide a source of 28Vdc
and/or 14Vdc power for powering portable/removable
devices from the aircraft electrical system. The power
sockets, located on the top or sides of the center pedestal
assembly, are protected by either fuses or circuit breakers
(refer to the supplemental schematic diagrams provided
with the aircraft).
2. The power sockets are placarded with the voltage
type and maximum current load.
7-81. Headset Jacks
1. The aircraft is equipped with headset jacks for
each seat position. Insert the headset plug into the jack that
corresponds with the seat in the aircraft.
NOTE
The headset jack locations described below are
typical for a 4- or 5-place configuration.
a. The pilot and passenger #4 headset jacks (HDST
PLT and HDST PASS) are located on the upper left side of
the cabin backwall. The co-pilot headset jack (HDST COPLT) is located on the right side of the cabin behind the copilot seat near the floor. Passenger #1 (co-pilot seat
position) headset jack (HDST PASS) is located on the right
side of the lower console. Passenger #2 and passenger #3
headset jacks (HDST PASS) are located on the upper right
side of the cabin backwall.
NOTE
Noise-cancelling powered headsets must be
switched to ON.
2. Volume Adjustment. Refer to the specific model
headset, ICS/VOX or audio panel operation manual for
volume adjustment.
Rev. 24
Report No. 28-AC-023 May 2/19
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