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Page: i
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280F
Report No: 28-AC-019
Date: 2/14/17
TABLE OF CONTENTS
AND
LIST OF EFFECTIVE PAGES
SECTION PAGE
Manual Cover Dated December 31, 1980
as revised
Table of Contents and List of i thru ii
Effective Pages
Log of Supplements iii
Log of Pages and Revisions iv thru vi
EASA Log of Revisions vii
EASA Log of Supplements viii
1 General 1.0 thru 1.5
2 Operating Limitations – FAA Approved 2.0 thru 2.7
3 Emergency and Malfunction Procedures 3.0 thru 3.11
FAA Approved
4 Normal Procedures 4.0 thru 4.13
5 Performance – FAA Approved 5.0 thru 5.12
6 Weight and Balance 6.0 thru 6.16
7 Aircraft and Systems Description 7.0 thru 7.8
8 Inspections, Maintenance, Servicing, 8.0 thru 8.15
Storage and Handling
9 Operational Information 9.0
10 Supplements 10.0
Supplement 1 10.1.1 thru 10.1.13
Wet/Dry Dispersal System
Supplement 2 10.2.1 thru 10.2.10
Float Landing Gear
Page 3
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280F
Report No: 28-AC-019
Date: 2/14/17
SECTION PAGE
10 Supplements - Continued
Supplement 3 10.3.1 thru 10.3.6
External Loads
Supplement 4 10.4.1
Snowshoe
Supplement 5 10.5.1
(Reserved)
Supplement 6 10.6.1
Right Side Pilot Configuration
Supplement 7 10.7.1
(Reserved)
Supplement 8 10.8.1 thru 10.8.9
Emergency Float Landing Gear
Supplement 9 10.9.1
(Reserved)
Supplement 10 10.10.1
(Reserved)
Supplement 11 10.11.1 thru 10.11.11
(Reserved)
Supplement 12 10.12.1
(Reserved)
Page 4
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280F
Report No: 28-AC-019
Date: 2/14/17
LOG OF SUPPLEMENTS
SUP.
NO
DESCRIPTION DATE FAA APPROVED
1 Wet/Dry Dispersal System 12-31-80 C. E. Arnold
2 Float Landing Gear 12-31-80 C. E. Arnold
3 External Loads 12-31-80 C. E. Arnold
4 Snowshoe 12-31-80 C. E. Arnold
5 (Reserved)
6 Right Side Pilot Configuration 6-26-81 C. E. Arnold
7 (Reserved)
8 Emergency Float Landing Gear 11-20-81 C. E. Arnold
9 (Reserved)
10 (Reserved)
11 Auxiliary Fuel Tank 9-23-83 J. Hannen
12 Engine Exhaust Muffler 7-16-86 P. Moe
APPROVED FOR MANAGER CHICAGO AIRCRAFT CERTIFICATION OFFICE,
CENTRAL REGION
FEDERAL AVIATION ADMINISTRATION
FAA Approved: March 28, 2017
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Page: vi
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280F
Report No: 28-AC-019
Date: 2/14/17
LOG OF PAGES AND REVISIONS
REV. NO PAGES DESCRIPTION DATE FAA APPROVED
5
(cont’d)
7.6 thru
7.8
8.5
8.15
10.12.1
Moved Text, Added 28-Volt System
Added 28-Volt System
Added Page
Added Page
Dec 14/88 Pat Moe
6 4.7, 4.9 Corrected Page Numbering Error Nov 7/89 Pat Moe
7
8
i
vi
3.10 thru
3.11
i, ii, iii, vi
vii, viii
4.1, 4.2,
4.3, 4.4
10.7.1
Revised List of Effective Pages
FAA Approval
Added Lamiflex Bearing Failure
Emergency Procedures
Updated
Added EASA Approval Logs
Added Fuel Management
Inspection Checklist
(Content removed, Reserved)
Jul 9/12
J. Miess
10.10.1
(Content removed, Reserved)
APPROVED FOR MANAGER CHICAGO AIRCRAFT CERTIFICATION OFFICE,
CENTRAL REGION
FEDERAL AVIATION ADMINISTRATION
FAA Approved: March 28, 2017
Page 8
Page: vii
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280F
Report No: 28-AC-019
Date: 2/14/17
EASA LOG OF REVISIONS
REV.
NO
1 Sep 28/03 Article 3, Commission Regulation (EU) 748/2012 N/A
2 Sep 28/03 Article 3, Commission Regulation (EU) 748/2012 N/A
3 Sep 28/03 Article 3, Commission Regulation (EU) 748/2012 N/A
4 Sep 28/03 Article 3, Commission Regulation (EU) 748/2012 N/A
5 Sep 28/03 Article 3, Commission Regulation (EU) 748/2012 N/A
6 Sep 28/03 Article 3, Commission Regulation (EU) 748/2012 N/A
7 Aug 17/15 FAA/EASA T.I.P.* G. J. Michalik
8 Aug 16/17 FAA/EASA T.I.P.*
DATE EASA APPROVED
FAA APPROVAL ON
BEHALF OF EASA
* Section 3.2 T.I.P.
FAA Approved: March 28, 2017
Page 9
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280F
Report No: 28-AC-019
Date: 2/14/17
EASA LOG OF SUPPLEMENTS
SUP.
NO
1
2 Float Landing Gear Sep 28/03
3 External Loads Sep 28/03
4 Snowshoe Sep 28/03
DESCRIPTION DATE EASA APPROVED
Wet/Dry Dispersal
System
Sep 28/03
Article 3, Commission
Regulation (EU) 748/2012
Article 3, Commission
Regulation (EU) 748/2012
Article 3, Commission
Regulation (EU) 748/2012
Article 3, Commission
Regulation (EU) 748/2012
5 [Reserved]
6
Right Side Pilot
Configuration
NOT EASA APPROVED
7 [Reserved]
8
Emergency Float
Landing Gear
Sep 28/03
Article 3, Commission
Regulation (EU) 748/2012
FAA APPROVAL ON
BEHALF OF EASA
N/A
N/A
N/A
N/A
N/A
9 [Reserved]
10 [Reserved]
11 Auxiliary Fuel Tank Sep 28/03
12 Engine Exhaust Muffler Sep 28/03
Article 3, Commission
Regulation (EU) 748/2012
Article 3, Commission
Regulation (EU) 748/2012
FAA Approved: March 28, 2017
N/A
N/A
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Page: 4.1
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280F
Report No: 28-AC-019
Date: 2/14/17
SECTION 4 – NORMAL PROCEDURES
I. PREFLIGHT PLANNING
A. Review and be familiar with Section 2, “Operating Limitations.”
B. Calculate weight and balance and review loading information in Section 6, “Weight
and Balance.”
C. Obtain weather briefing and file flight plan.
D. Refer to Section 5, “Performance,” to determine if helicopter is within limitations for
planned loads, winds, temperature and pressure altitudes.
NOTE: Pilot experience and training is another factor to consider prior to
conducting certain flights, even if helicopter is within its operating
envelope.
E. Check helicopter and engine log books to determine if helicopter is airworthy.
II. PREFLIGHT PLANNING
This checklist is designed to be used as a guide while performing the preflight inspection.
Thoroughly familiarize yourself with the Maintenance Manual before utilizing this
checklist.
A. Cabin
Prior to starting the exterior inspection, check the cabin for the following items:
1. Standard Airworthiness Certificate, FAA Form 8100-2.
2. Certificate of Aircraft Registration, AC Form 8050-3.
3. If communications radio installed – Aircraft Radio Stations License FCC Form
556.
4. Flight Manual for helicopter to be flown. Check forms F-165A and F-168A in
Section 6 for actual weight and balance of helicopter to be flown. The serial
number of the helicopter to be flown should appear on these forms.
NOTE: The above items are to be carried in the helicopter at all times. Owners
and operators of exported helicopters should check with their own Aviation
Officials to determine documents required.
5. Master switch – OFF.
6. Ignition switch – OFF.
7. All other switches – OFF.
8. Fuel valve – ON.
FAA Approved: March 28, 2017
Page 38
Page: 4.2
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280F
Report No: 28-AC-019
Date: 2/14/17
B. Preflight Inspection – Fuel Management
1. Left fuel tank drain – Drain sample into jar. Verify the fuel grade, check the
cleanliness, and check that fuel is free of water.
WARNING: Sample the left and right fuel tank sumps before checking the fuel
filter.
NOTE: Aircraft should be level or slightly nose down. Rock the aircraft by moving
the tail up and down to displace any water or contaminants to the tank
sumps. If water is found, rock the aircraft and re-sample. Check the other
tank. Repeat until no water is found. Then check the fuel filter.
2. Right fuel tank drain – Drain sample into jar. Verify the fuel grade, check the
cleanliness, and check that fuel is free of water.
3. Fuel filter – Secure and drain fuel sample into jar. Verify the fuel grade, check the
cleanliness, and check that fuel is free of water.
C. Exterior Inspection
1. Remove covers and tie-downs.
2. Left door – check condition, security and latch operation.
3. Windshield – check condition.
4. Pitot tube – unobstructed.
5. Landing light – check condition.
6. Right door – check condition, security and latch operation.
7. Right oleo struts – check extension and security.
8. Right landing gear – check condition and security. Check ground handling wheel in
up position and secured.
9. Right side engine compartment:
a. Electrical wiring – condition and terminals tight.
b. Induction system – no obstructions, filter secure, induction hose and lines secure
and backfire and alternate air doors free.
c. Fuel filter – secure.
d. Fuel lines – secure.
e. Oil lines – secure and no sign of leakage.
f. Exhaust – no cracks or signs of leakage.
g. Cowl door – secure.
FAA Approved: March 28, 2017
Page 39
Page: 4.3
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280F
Report No: 28-AC-019
Date: 2/14/17
10. Upper inspection door:
a. Swashplate and control rods – check condition and security.
b. Fuel tank and lines – check for leaks and lines and fittings secure.
c. Fire curtain – check condition.
11. Kick-in step door:
a. Belt drive system – check security and condition of idler pulley, main drive belt.
b. Tail rotor drive shaft – check condition of flex coupling.
c. Rotor tach drive – check condition.
d. Cooling fan – check condition.
12. Right fuel tank – check for leaks, fuel quantity and cap secured.
13. From steps:
a. Check main rotor gearbox filler cap closed.
b. Check area between fuel tanks for leaks and obstruction to air flow.
c. Main rotor shaft – check condition.
d. Main rotor blades – security and condition of leading edge blade tape, no bond
separations, cracks or corrosion. Main rotor retention pins secured.
e. Check main rotor hub for security of all fasteners, no cracks or obvious damage.
f. Main rotor pitch links – check for binding or looseness.
g. Main rotor dampers – check for security and no leakage.
14. Baggage box:
a. Check contents secured. Observe weight limitations.
b. Open inspection door – check main rotor transmission sight gauge. Normal level
is halfway mark on sight gauge.
c. Door secured.
15. Right static port – check unobstructed.
16. Tail cone – check condition.
17. Tail rotor drive shaft – condition and security of drive shaft, hangar bearings and flex
couplings.
18. Horizontal stabilizer – check condition and security.
19. Position lights – check security.
FAA Approved: March 28, 2017
Page 40
Page: 4.4
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280F
Report No: 28-AC-019
Date: 2/14/17
20. Tail rotor
a. Control cables – check condition and security.
b. Tail rotor transmission – check for oil leakage and check oil quantity. Check for
security of attachment.
c. Tail rotor guard – check for security and evidence of strike damage.
d. Pitch change link mechanism – check condition and operation. Check pitch links
for binding or looseness.
e. Tail rotor hub – check security. Check condition of teeter stop bumpers.
f. Tail rotor blades – check security. Check for cracks or bond separations. Check
strike tabs for evidence of strike.
21. Left static port – unobstructed.
22. Inspection door:
a. Belt drive system – engage manual clutch and check belt tensioning system for
proper rigging. Disengage manual clutch.
b. Cooling fan – check condition.
23. Left fuel tank – check for leaks, fuel quantity and cap secured.
24. Upper inspection door:
a. Check engine oil quantity – 10 quarts full, 8 quarts minimum for flight.
b. Swashplate and control rods – check condition and security.
c. Fuel tank and lines – check for leaks, lines and fittings secure.
d. Fire curtain – check condition.
25. Left engine compartment:
a. Turbocharger – check condition and security. Check condition of thermal cover
and check area around turbocharger for evidence of heat damage.
b. Exhaust system and wastegate – check for security and evidence of leakage.
Wastegate linkage should be in detent, throttle motion should be free and
unrestricted with associated wastegate motion.
c. Cowl door secure.
26. Left oleo struts – check extension and security.
27. Left landing gear – check condition and security. Ground handling wheel in up
position and secured.
28. Check operation of all lights for night flight.
FAA Approved: March 28, 2017
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