Textron Bell 212 Maintenance Manual

BHT-212-MM-1

COPYRIGHT NOTICE

COPYRIGHT

201

BELL

®

HELICOPTER TEXTRON INC.
AND BELL HELICOPTER TEXTRON
CANADA LTD.

ALL RIGHTS RESERVED

The instructions set forth in this manual, as supplemented or modified by Alert Service Bulletins (ASB) or
other directions issued by Bell Helicopter Textron Inc. and Airworthiness Directives (AD) issued by the
applicable regulatory agencies, shall be strictly followed.

Export Classification C, ECCN 9E991

MAINTENANCE MANUAL

VOLUME 1

GENERAL INFORMATION

NOTICE

REISSUE — 7 JUNE 1993

REVISION 16 — 15 NOVEMBER 2018

BHT-212-MM-1

PROPRIETARY RIGHTS NOTICE

These data are proprietary to Bell Helicopter Textron Inc. Disclosure,
reproduction, or use of these data for any purpose other than helicopter
operation or maintenance is forbidden without prior written authorization from
Bell Helicopter Textron Inc.

DESTINATION CONTROL STATEMENT

WARNING — This document contains technical data whose export is restricted
by the Arms Export Control Act (Title 22, U.S.C., Sec 2751, et. seq.) or the Export
Administration Act of 1979, as amended, Title 50, U.S.C., App. 2401 et. seq.
Violations of these export laws are subject to severe criminal penalties.
Disseminate in accordance with provisions of DoD Directive 5230.25.

Additional copies of this publication may be obtained by contacting:

PN Rev. 15 29 NOV 2013

Commercial Publication Distribution Center

Bell Helicopter Textron Inc.

P. O. Box 482

Fort Worth, Texas 76101-0482

Export Classification C, ECCN 9E991

WARNING

THIS MANUAL APPLIES ONLY TO HELICOPTERS AND COMPONENTS
MAINTAINED IN ACCORDANCE WITH BELL HELICOPTER TEXTRON
(BELL) APPROVED PROCEDURES USING BELL APPROVED PARTS.

ALL INSPECTION, REPAIR AND OVERHAUL PROCEDURES PUBLISHED
BY BELL, INCLUDING PART RETIREMENT LIFE, ARE BASED SOLELY ON
THE USE OF BELL PARTS THAT HAVE BEEN MAINTAINED USING BELL
APPROVED DATA. THE DATA PUBLISHED HEREIN OR OTHERWISE
SUPPLIED BY BELL IS NOT APPLICABLE TO NON-BELL PARTS OR
PARTS THAT HAVE BEEN REPAIRED USING DATA AND/OR PROCESSES
NOT APPROVED BY BELL.

BELL IS NOT RESPONSIBLE FOR ANY PART OTHER THAN THOSE THAT
IT HAS APPROVED.

BEFORE PERFORMING ANY PROCEDURE CONTAINED IN THIS MANUAL
YOU MUST INSPECT THE AFFECTED PARTS AND RECORDS FOR
EVIDENCE OF ANY MANUFACTURE, REPAIR, REWORK OR USE OF A
PROCESS NOT APPROVED BY BELL.

IF YOU IDENTIFY OR SUSPECT THE USE OF PARTS NOT AUTHORIZED
BY BELL, EITHER REMOVE THE AFFECTED ITEM FROM THE AIRCRAFT
OR OBTAIN INSTRUCTIONS FOR CONTINUED AIRWORTHINESS FROM
THE MANUFACTURER OR THE ORGANIZATION THAT APPROVED THE
REPAIR.

BHT-212-MM-1

Export Classification C, ECCN EAR99

26 JUN 2013 Rev. 14 Warning

BHT-212-MM-1

Flying smart means that no matter where you are, or what time it is, you can make a call
and get additional information, clarification, or advice on a technical or operational issue
concerning your helicopter or information contained in our Technical Publications.
Product Support Engineering (PSE) is just a phone call away and may be contacted as
follows:

CUSTOMER SUPPORT AND SERVICES

Model 206, 407 or 505

Phone: [phone] or 800-243-6407 ( U.S./Canada)
Fax: [phone]
E-mail: [e-mail]

Model 222, 230, 427, 429, or 430

Phone: [phone] or 800-463-3036 ( U.S./Canada)
Fax: [phone]
E-mail: [e-mail]

Model 204, 205, 212, or 412

Phone: [phone] or 800-363-8028 ( U.S./Canada)
Fax: [phone]
E-mail: [e-mail]

Model 214, 210, HUEY II and All Bell’s Active and
Surplus Military Medium Helicopter Models

Phone: [phone]
Fax: [phone]
E-mail: [e-mail]

Model OH-58, TH-67, TH-57, Both Active and
Military

Phone: [phone]
Fax: [phone]
E-mail: [e-mail]

Surplus

For additional information on Customer Suppo rt a nd Ser vices as well as Pr oduct Su pp ort
Engineering (PSE) and your local Customer Service Engineering (CSE) network, please
access http://www.bellflight.com/support-and-service/support.

CSS Rev. 16 15 NOV 2018 Export Classification C, ECCN EAR99

H

ELP

E

VALUATE

L

OGISTICS

P

UBLICATIONS

Have you found something wrong with this manual — an
error, an inconsistency, unclear instructions, etc.? Although
we strive for accuracy and clarity, we may make errors on
occasion. If we do and you discover it, we would appreciate
your telling us about it so that we can change whatever is
incorrect or unclear. Please be as specific as possible.

Your complaint or suggestion will be acknowledged and we
will tell you what we intend to do.

You may use the enclosed Customer Feedback form, as
applicable, to inform us where we have erred.

Your assistance is sincerely appreciated.

Export Classification C, ECCN EAR99

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Export Classification C, ECCN EAR99

SPARE PARTS WARRANTY

ONE YEAR/1,000 HOURS PRORATED

WARRANTY AND REMEDY: Seller warrants each new helicopter part or helicopter part reconditioned by seller to be free from defect
in material and workmanship under normal use and service and if installed on Bell model helicopters. Seller’s sole obligation under this
warranty is limited to replacement or repair of parts which are determined to Seller’s reasonable satisfaction to have been defective
with 1,000 hours of operation or one (1) year after installation, whichever occurs first and reimbursement of reasonable freight charges.
After 200 hours of use, there will be a prorated charge to the Purchaser for replacement parts (prorating the hours of total use against
the then applicable part life or 2,000 hours, whichever is the lesser). Defective parts must be reported in writing to the Seller’s Warranty
Administration within 90 days of being found defective. Replacement of parts may be with either new or reconditioned parts, at Seller’s
election. Warranty adjustment is contingent upon the Purchaser complying with the Warranty Remedies as described in the
Commercial Warranty Information brochure and the Seller’s Warranty Administration disposition instructions for defective parts. Failure
to comply with all of the terms of this paragraph may, at Seller’s sole option, void this warranty.

NOTE: Parts, components and assemblies of all new helicopters may have been restored or reworked due to mars, blemishes, dents
or other irregularities during the manufacturing process. Such restoration and/or rework is permitted under Seller’s approved
manufacturing and engineering processes and guidelines. The restoration and/or rework so completed does not render such items
defective in material or workmanship.

THIS WARRANTY IS GIVEN AND ACCEPTED IN PLACE OF (i) ALL OTHER WARRANTIES OR CONDITIONS, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANT ABILITY AND
FITNESS FOR A PARTICULAR PURPOSE AND (ii) ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY IN CONTRACTOR
IN TORT (DELICT), INCLUDING PRODUCT LIABILITIES BASED UPON STRICT LIABILITY, NEGLIGENCE, OR IMPLIED
WARRANTY IN LAW.

This warranty is the only warranty made by Seller. The Purchaser’s sole remedy for a breach of this warranty or any defect in a part is
the repair or replacement of helicopter parts and reimbursement of reasonable freight charges as provided herein. Seller excludes
liability, whether as a result of a breach of contract or warranty, negligence or strict product liability, for incidental or consequential
damages, including without limitation, damage to the helicopter or other property, costs and expenses resulting from required changes
or modifications to helicopter components and assemblies, changes in retirement lives and overhaul periods, local customs fees and
taxes, and costs or expenses for commercial losses or lost profits due to loss of use or grounding of helicopters or otherwise.

Seller makes no warranty and disclaims all liability in contract or in tort (delict), including, without limitation, negligence and strict tort
(delictual) liability, with respect to work performed by third parties at Purchaser’s request and with respect to engines, engine
accessories, batteries, radios, and avionics, except Seller assigns each manufacturer’s warranty to Purchaser to the extent such
manufacturer’s warranty exists and is assignable.

This warranty shall not apply to any helicopter part which has been repaired or altered outside Seller ’s factory in any way so as, in
Seller’s judgment, to affect its stability, safety or reliability, or which has been subject to misuse, negligence or accident, or which has
been installed in any aircraft which has been destroyed unless that helicopter has been rebuilt by Bell. A list of destroyed aircraft is
obtainable from Bell Product Support. Repairs and alterations which use or incorporate parts and components other than genuine Bell
parts or parts approved by Bell for direct acquisition from sources other than Bell itself are not warranted by Bell, and this warranty shall
be void to the extent that such repairs and alterations, in Seller’s sole judgment, affect the stability, safety or reliability of the helicopter
or any part thereof, or damage genuine Bell or Bell-approved parts. No person, corporation or organization, including Bell Customer
Service Facilities, is authorized by Seller to assume for it any other liability in connection with the sale of its helicopters and parts.

NO STATEMENT, WHETHER WRITTEN OR ORAL, MADE BY ANY PERSON, CORPORATION OR ORGANIZATION, INCLUDING
BELL CUSTOMER SERVICE FACILITIES MAY BE TAKEN AS A WARRANTY NOR WILL IT BIND SELLER.

Seller makes no warranty and disclaims all liability with respect to components or parts damaged by, or worn due to, corrosion. Seller
makes no warranty and disclaims all liability for consumables (wear items) which are defined as items required for normal and routine
maintenance or replaced at scheduled intervals shorter than the warranty period. “Consumables” include but are not limited to engine
and hydraulic oil, oil filters, packings and o-rings, anti-corrosion and/or sealing compounds, brush plating material, nuts, bolts, washers,
screws, fluids, compounds, and standard aircraft hardware that is readily available to aircraft operators from sources other than Seller.

All legal actions based upon claims or disputes pertaining to or involving this warranty including, but not limited to, Seller’s denial of any
claim or portion thereof under this warranty, must be filed in the courts of general jurisdiction of Tarrant County, Texas or in the United
States District Court for the Northern District of Texas, Ft. Worth Division located in Ft. Worth, Tarrant County, Texas. In the event that
Purchaser files such an action in either of the court systems identified above, and a final judgment in Seller’s favor is rendered by such
court, then Purchaser shall indemnify Seller for all costs, expenses and attorneys’ fees incurred by Seller in defense of such claims. In
the event Purchaser files such a legal action in a court other than those specified, and Seller successfully obtains dismissal of that
action or transfer thereof to the above described court systems, then Purchaser shall indemnify Seller for all costs, expenses and
attorneys’ fees incurred by Seller in obtaining such dismissal or transfer.

January 2007

BHT-212-MM-1

Export Classification C, ECCN EAR99

26 JUN 2013 Rev. 14 Warranty

BHT-212-MM-1

TABLE OF CONTENTS

Paragraph Chapter/Section Page
Number Title Number Number

CHAPTER 5 — INSPECTIONS

INSPECTIONS

5-1 General.......................................................................................... 5-00-00 5

5-2 Inspection Requirements............................................................... 5-00-00 6

5-3 Crash Damage............................................................................... 5-00-00 6

5-4 Types of Inspections...................................... .... ............................ 5-00-00 6

5-5 Definitions...................................................................................... 5-00-00 7

5-6 Inspection and Overhaul Tolerance............................................... 5-00-00 8

SCHEDULED INSPECTIONS

5-7 Scheduled inspections................................................................... 5-00-00 11

5-8 Daily Inspection — Part A.............................................................. 5-00-00 13

5-9 100 Hours/12 Calendar Months — Part A ..................................... 5-00-00 29

5-10 1000 Hours — Part A..................................................................... 5-00-00 53

5-11 3000 Hours/5 Years — Part A ....................................................... 5-00-00 55

5-12 25 Hours/30 Days — Part B........................................................... 5-00-00 61

5-13 300 Hours — Part B....................................................................... 5-00-00 79

5-14 600 Hours/12 Months — Part B..................................................... 5-00-00 91

5-15 3000 Hours/ 5 Years — Part B ...................................................... 5-00-00 99

SPECIAL INSPECTIONS

5-16 Special Inspection.......................................................................... 5-00-00 105

5-17 Daily Inspection.............................................................................. 5-00-00 107

5-18 Daily or Each 10 Hours of Flight Operation, Whichever Occurs

First Until 250 Hours...................................................................... 5-00-00 109

5-19 Between 5 and 10 Hours of Flight AFter Each Installation ............ 5-00-00 115

5-20 Fin Spar Cap Inspection Every 8 Hours......................................... 5-00-00 117

5-21 Each 25 Hours for the next Four Inspections................................. 5-00-00 119

5-22 Each 25 Hours of Flight Operation................................................. 5-00-00 121

5-23 Each7DaysinaCorrosiveEnvironment and Each 30 Days in a

Noncorrosive Environment............................................................. 5-00-00 127

5-24 50 Hours After Installation of Components .................................... 5-00-00 129

5-25 Each 50 Hours of Component Operation....................................... 5-00-00 131

5-26 Each 100 Hours of Main Rotor Blade Operation — Deleted. ......... 5-00-00 133

5-27 Each 100 Hours/12 Months of Transmission Operation............. ... 5-00-00 135

5-28 Each 100 Hours/12 Months of Intermediate Gearbox Operation... 5-00-00 137

5-29 Each 100 Hours/12 Months of Tail Rotor Gearbox Operation....... 5-00-00 139

5-30 Each 100 Hours/12 Months of Battery System Operation............. 5-00-00 141

5-31 100 Hours After Installation of Tailboom........................................ 5-00-00 143

5-32 Each 150 Hours of Starter Generator P/N 200SG119Q

Operation....................................................................................... 5-00-00 145

5-33 Fin Spar Cap Inspection Every 300 Hours..................................... 5-00-00 147

5-34 Each 300 Hours/12 Months of Transmission Operation............. ... 5-00-00 149

26 JUN 2013 Rev. 14 Page 1Export Classification C, ECCN EAR99

5-00-00

BHT-212-MM-1

TABLE OF CONTENTS (CONT)

Paragraph Chapter/Section Page
Number Title Number Number

5-35 Each 300 Hours/3 Months of Driveshaft Operation ....................... 5-00-00 151

5-35A Each 300 Hours/12 Months Inspection of Tail Rotor

Control Tube and Bearing.............................................................. 5-00-00 152A

5-36 Main Rotor Grip Ultrasonic Inspection........................................... 5-00-00 153

5-37 Each 500 Hours/6 Months of Blade Service .................................. 5-00-00 155

5-38 Each 600 Hours of Transmission Operation.................................. 5-00-00 157

5-39 600 Hours/6 Months of Tail Rotor Driveshaft Coupling

Operation....................................................................................... 5-00-00 159

5-40 600 Hours/12 Months of Main Driveshaft Operation...................... 5-00-00 161

5-40A Each 600 Hours/12 Months Inspection of Magnetic Brake

Assembly ....................................................................................... 5-00-00 162A

5-40B Each 600 Hours/12 Months Inspection of Fire Extinguisher

Discharge Tubes............................................................................ 5-00-00 162C

5-41 Each 1000 Hours of Component Operation .................................. 5-00-00 163

5-42 First 1000 Hours of Component Time and Each 3000 Hours

Thereafter of Component Time...................................................... 5-00-00 165

5-43 Each 1000 Hours/12 Months of Main Rotor Blade Operation........ 5-00-00 169

5-44 Each 1200 Hours/24 Months of Component Operation................. 5-00-00 171

5-45 Each 1200 Hours of Main Rotor Hub Pin Operation — Deleted.... 5-00-00 175

5-45A Every 12 months/2500 Landings High Forward Crosstube

Deflection Check...................................... ... ................................... 5-00-00 176A

5-45B Every 12 months/5000 Landings High Forward Crosstube

Fluorescent Penetrant Inspection.................................................. 5-00-00 176C

5-46 Each 24 Months of Flight Control System Bolt Operation........ .... .. 5-00-00 177

5-47 Each 3000 Hours of Component Operation................................... 5-00-00 181

5-48 10,000 Hour Total Airframe Time and Each 300 Hours/12 Months

Main Beam Cap Operation ............................................................ 5-00-00 187

CONDITIONAL INSPECTIONS

5-49 Condition Inspection ...................................................................... 5-00-00 189

5-50 After Hard Landing......................................................................... 5-00-00 191

5-51 After Blade Strike or Other Rotating System Torque Spike........... 5-00-00 197

5-52 After Overspeed............................................................................. 5-00-00 205

5-53 After Overtorque ............................................................................ 5-00-00 209

5-54 After Engine Compressor Stall or Surge........................................ 5-00-00 213

5-55 After Lightning Strikes.................................................................... 5-00-00 219

5-56 After Engine Combining Gearbox Clutch Nonengagement,

Misengagement, or In-flight Slippage ............................................ 5-00-00 227

COMPONENT OVERHAUL SCHEDULE

5-57 Component Overhaul Schedule..................................................... 5-00-00 231

5-00-00
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BHT-212-MM-1

FIGURES

Figure Page
Number Title Number

TABLES

Table Page
Number Title Number

5-1 Fuselage Tailboom Attachment Inspection......................................................... 50

5-2 Inspection of Beam Caps.................................................................................... 51

5-3 Collective Stick Tube .......................................................................................... 104

5-4 Inspection of Main Rotor Hub Grip Tangs, Barrel and Drag Brace Attachment

Lugs.................................................................................................................... 108

5-5 Spiral Bevel Gears Serial Numbers.................................................................... 111

5-6 Inspection of Spiral Bevel Gear ............................................................ ... .... ... ... . 112

5-6A Tail Rotor Blade - Detailed Inspection ................................................................ 126B

5-7 Inspection of Main Rotor Hub Grip (1200 Hours/24 Months)................... .... ... .... 174

5-1 Component Overhaul Schedule.......................................................................... 231

Export Classification C, ECCN EAR99

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5-00-00

INSPECTIONS

WARNING

NOTE

BHT-212-MM-1

5-1. GENERAL

This chapter contains the requirements for the
Scheduled, Special, and Conditional Inspections and a
Component Overhaul Schedule.

FAILURE TO CORRECT CONDITIONS
SUCH AS, BUT NOT LIMITED TO,
CORROSION, EROSION, MECHANICAL
DAMAGE, OR OBVIOUS WEAR FOUND
DURING A SCHEDULED INSPECTION
COULD SERIOUSLY AFFECT THE
AIRWORTHINESS OF THE HELICOPTER.

These inspection requirements constitute an approved
inspection program for the Bell H elicopter Model 212.
For the convenience of the operator, two separate
Scheduled Inspections are provided as follows:

Part A scheduled inspections consists of a daily
inspection, 100 hour/12 calendar month inspection,
1000 hour inspection, and a 3000 hour/5 year
inspection.

Part B scheduled inspections consists of a 25 hour/
30 day inspection, 300 hour inspection, 600 hour/
12 month inspection, and a 3000 hour/5 year
inspection.

Either Part A or Part B inspection program may be
utilized. However, once a helicopter has been started
on an inspection program, it shall be maintained on
that program except as follows:

The helicopter may then be changed to the Part A
inspection program beginning with a Daily
Inspection.

The inspection intervals given in this chapter are the
maximum permitted. Do not exceed these intervals.
The owner/operator is responsible for increasing the
scope and the frequency of the inspections as
necessary. Make sure the helicopter is maintained
safely during all unusual local changes, such as
environmental conditions, helicopter use, etc. You can
request changes to the requirements in this chapter
through the local Aviation Authority.

The inspection intervals and the component overhaul
schedule provided in this chapter a re applicable only
to Bell Helicopter Textron approved parts.

The time period given for the overhaul of a
component (or the failure to give a time
period for the overhaul of a component)
does not constitute a warranty of any kind.
The only warranty applicable to the
helicopter or any component is the
warranty included in the Purchase
Agreement for the helicopter or the
component.

The Time Between Over haul (T BO) a nd the inspection
periods are determined through experience, tests,
Lead The Fleet (LTF), or any other special programs
and the judgement of Bell Helicopter Textron
engineers. They are subject to change only by Bell
Helicopter Textron or an approved Airworthiness
Authority.

• If a helicopter is being inspected on the Part A
inspection program and it is preferable to change
to the Part B program, a complete Part A — 1000
Hour Inspection shall be accomplished. The
helicopter may then be changed to the Part B
inspection program beginning with a 25 Hour/15
Day Inspection.

• If a helicopter is being inspected on the Part B
inspection program and it is preferable to change
to the Part A program, a complete Part B — 600
Hour/12 Month Inspection shall be accomplished.

Changes to the TBO will be introduced by either
revision to this chapter or a Technical Bulletin.

Every calendar and hourly inspection is a thorough
visual inspection to determine the airworthiness of the
helicopter and the components. Qualified persons
must do the inspections in accordance with quality
standard aircraft practices and the applicable
maintenance manuals. Bell Helicopter Textron
considers that it is mandatory to obey all the
applicable Alert Service Bulletins (ASB) and the
Airworthiness Directives (AD).

5-00-00

26 JUN 2013 Rev. 14 Page 5Export Classification C, ECCN EAR99

BHT-212-MM-1

WARNING

Component operating time records are necessary for
components that have scheduled maintenance
procedures, which are different from those of the
airframe. It is the owner/operator’s responsibility to
keep the Historical Service Records (HSR) for the
applicable component and to do the necessary
maintenance procedures.

Before each inspection, remove or open the
necessary cowlings, fairing, inspection doors, and
panels.

5-2. INSPECTION REQUIREMENTS

This manual does not include specific inspections
required by the FAA or other government regulatory
authorities. These specific inspections are given by
your government regulatory authority. Refer to their
requirements for these specific inspectio ns .

The owner/operator of the helicopter is responsible for
the maintenance done on the helicopter. It is the
owner.operator’s responsibility to:

1. Establish, maintain, and review the log books for
discrepancies.

2. Make sure the Alert Service Bulletins (ASB), the
Airworthiness Directives (AD), and the special
inspections are done when they are required to be
done.

3. Make sure the scheduled inspections, the special
inspections, and the required tests for all of the
installed kits are complied with.

4. Make sure all parts and components for which
Historical Service Records are required have
documented traceability to their original installation in
the helicopter.

EXTENT THAT THERE IS NO CHANCE
OF REPAIR OR INSTALLATION ON ANY
HELICOPTER OR COMPONENT.

5. Make sure all limited life parts that have
completed their published operating limits are
replaced.

6. Make sure all of the components that have
completed their published overhaul periods are
overhauled.

7. Make sure all of the maintenance that is done on
the helicopter is done by an approved maintenance
organization.

The maintenance organization/person doing the
maintenance is responsible for the quality of the
maintenance done.

The owner/operator may choose to ask the
maintenance organization/person doing the
maintenance to perform the tasks listed by prior
arrangement through a separate formal agreement.

5-3. CRASH DAMAGE

Because of the many possible co mbinations that can
result from crash damage, it is not possible to include
the specific repair tasks in this category. The
helicopter mechanic must make an analysis of the
crash damage for each situation. Do the repair in
accordance with the degree of damage to the sp ecific
part and the applicable repair procedures in this
manual. Call Product Support Engineering with your
analysis of the crash damage.

5-4. TYPES OF INSPECTIONS

1. The maintenance procedures may include

scheduled inspections, special inspections, conditional
inspections, component interim inspections, and
component overhaul inspections.

ALL PARTS REMOVED, DUE TO
REACHING THEIR LIMITS OR AS A
RESULT OF AN ACCIDENT/INCIDENT
INSPECTION AND DEEMED
UNAIRWORTHY, SHALL BE
PERMANENTLY MARKED AS SCRAP OR
PHYSICALLY DESTROYED TO THE

5-00-00
Page 6 Rev. 14 26 JUN 2013 Export Classification C, ECCN EAR99

a. Scheduled inspections must occur at specified

operating intervals. The intervals may be in operating
time (hours), cycles, torque events (RIN), calendar
(days, months, years) or other assigned units. This
makes sure that the helicopter is airworthy.

• Scheduled inspections — Part A consists of:

BHT-212-MM-1

– Daily inspection — Accomplish daily before

flight operation.

– 100 hours/12 calendar months — Accomplish

each 100 hours of flight operation or
12 calendar months, whichever comes first.

– 1000 hours — Accomplish ea ch 100 0 hours of

flight operation.

– 3000 hours/5 years — Accomplish each

3000 hours of flight operation or each
60 calendar months, whichever comes first.

• Scheduled inspections — Part B consists of the
following:

– 25 hours/30 days — Accomplish each

25 hours of flight operation or each 30 days,
whichever comes first.

– 300 hours — Accomplish each 300 hours of

flight operation.

– 600 hours/12 months — Accomplish each

600 hours of flight operation or each
12 calendar months, whichever comes first.

– 3000 hours/5 years — Accomplish each

3000 hours of flight operation or each
60 calendar months, whichever comes first.

3. Lubrication and servicing requirements are in
addition to those stated in this chapter (Chapter 12).

4. For corrosion control refer to the Corrosion
Control Guide, CSSD-PSE-87-001 and the
BHT-ALL-SPM.

5. For the PT6T-3/-3B engines, refer to the Pratt &
Whitney Canada Maintenance Manual for the
scheduled inspection, special inspection, conditional
inspection, and component overhaul schedule.

6. For the common Bell Helicopter Textron approved
optional equipment that is integrated into this
maintenance manual, refer to this chapter for the
scheduled inspection, conditional inspection,
component interim inspection, and component
overhaul inspection.

7. For all other Bell Helicopter Textron approved
equipment, refer to the applicable Service Instruction
for the scheduled inspection, special inspection,
conditional inspection, component interim inspection,
and component overhaul inspection.

8. For the inspection requirements for optional
equipment approved under Supplement Type
Certificate (STC), refer to the applicable STC
documentation. Maintenance and inspection of these
items are the responsibility of the owner/operator.

b. Special inspections are of a temporary nature

or of a special interval that is not consiste nt with the
scheduled inspections.

c. Conditional inspections do not occur at a

specified time. A conditional inspection is the result of
known or suspected unusual event, known or
suspected malfunctions, or defects.

d. An interim inspection occurs between

overhauls.

e. The component overhaul schedule gives the

elapsed operating time at which a component must be
removed, disassembled, examined for condition, and
overhauled, in accordance with data approved by Bell
Helicopter Textron.

2. Airworthiness limitations — Replace components

in accordance with Airworthiness Limitations Schedule
(Chapter 4).

5-5. DEFINITIONS

• Inspect, check, examine — Determine condition

relative to an established standard.

• Condition — The state of being of an item as
related to serviceable or unserviceable standard.

• Security — The presence of attaching parts that
are properly tightened or appear to be, and the
presence of properly installed (as required)
locking devices such as lockwire, cotter pins, or
other.

• Standard — An established rule or measure to
determine condition.

• Damage — Physical deterioration whereby the
standard renders the condition or an item
acceptable or not acceptable for continuous use.

5-00-00

26 JUN 2013 Rev. 14 Page 7Export Classification C, ECCN EAR99