Textron Bell 412 User manual

BHT-412-MM-1
NOTICE
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 EAR99
REISSUE — 23 JUNE 1994
REVISION 27 — 25 SEPTEMBER 2018
COPYRIGHT NOTICE
COPYRIGHT
201
BELL
® HELICOPTER TEXTRON INC.
AND BELL HELICOPTER TEXTRON
CANADA LTD.
ALL RIGHTS RESERVED
MAINTENANCE MANUAL
VOLUME 1
GENERAL INFORMATION

BHT-412-MM-1
PN Rev. 16 26 FEB 2013
Additional copies of this publication may be obtained by contacting:
Commercial Publication Distribution Center
Bell Helicopter Textron Inc.
P. O. Box 482
Fort Worth, Texas 76101-0482
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.
Export Classification C, ECCN EAR99
DESTINATION CONTROL STATEMENT
WARNING — This document contains technical data whose export is restricted
by theArms 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.

BHT-412-MM-1
26 FEB 2013 Rev. 16 Warning
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.
Export Classification C, ECCN EAR99

BHT-412-MM-1
CSS Rev. 27 25 SEP 2018
CUSTOMER SUPPORT AND SERVICES
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:
For additional information on Customer Support and Services as well as Product Support
Engineering (PSE) and your local Customer Service Engineering (CSE) network, please
access http://www.bellflight.com/support-and-service/support.
Model 206, 505, or 407
Phone: [phone] or 800-363-8023 (U.S./Canada)
Fax: [phone]
E-mail: [email protected]
Model 222, 230, 427, 429, or 430
Phone: [phone] or 800-463-3036 (U.S./Canada)
Fax: [phone]
E-mail: [email protected]
Model 204, 205, 212, or 412
Phone: [phone] or 800-363-8028 (U.S./Canada)
Fax: [phone]
E-mail: [email protected]
Model 210, HUEY II, and All Bell’s Active and Surplus
Military Medium Helicopter Models
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
Model OH-58, TH-67, TH-57, Both Active and Surplus
Military
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
Export Classification C, ECCN EAR99

HELP
EVALUATE
LOGISTICS
PUBLICATIONS
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

CUSTOMER FEEDBACK
Return by fax to Product Support Engineering [phone], e-mail to
[e-mail], or mail to the address on the next page.
Manual Title:
Manual Number (if assigned):
Date of Issue:
Date of Last Revision:
Section, Chapter, Paragraph Affected:
Your Feedback:
Now Reads:
Should Read:
Your Name:
Address:
Position: Telephone No.:
Company: Fax No.:
Reference No. (your initials and date):
(If you choose to mail this form, fold in thirds with address exposed, tape and mail.)
Export Classification C, ECCN EAR99

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Export Classification C, ECCN EAR99

IMPORTANT
HELICOPTER SALES NOTICE
Please complete this form and return by mail, e-mail ([e-mail]), or fax
(817-280-6466, Attention: CPDC). This will ensure that the new owners/operators receive
updates to their Bell Helicopter Textron Technical Manuals and Bulletins.
Model of Helicopter Sold or Purchased ___________________________________________
Serial and Registration Number _________________________________________________
Name of New Owner (company or individual) ______________________________________
Name of New Operator _______________________________________________________
Future Publications to be mailed to this address:
Address ____________________________________________________________________
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Fax No. ___________________________ Telephone No. ____________________________
E-mail Address ______________________________________________________________
Register for access to electronic publications at www.bellflight.com
Export Classification C, ECCN EAR99

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UNITED STATES
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FORT WORTH, TEXAS 76101-0482
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Export Classification C, ECCN EAR99

BHT-412-MM-1
26 FEB 2013 Rev. 16 Warranty
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
Export Classification C, ECCN EAR99

FAA APPROVED BHT-412-MM-2
4-00-00
15 SEP 2016 Rev. 24 Page 1
Export Classification C, ECCN EAR99
TABLE OF CONTENTS
Paragraph Chapter/Section Page
Number Title Number Number
CHAPTER 4 — AIRWORTHINESS LIMITATIONS SCHEDULE
AIRWORTHINESS LIMITATIONS SCHEDULE
4-1 Airworthiness Limitations Schedule............................................... 4-00-00 5
FIGURES
Figure Page
Number Title Number
4-1 Longitudinal/Lateral CG Envelope for Hoist Operations..................................... 16
TABLES
Table Page
Number Title Number
4-1 Airworthiness Limitations Schedule.................................................................... 6

BHT-412-MM-2 FAA APPROVED
4-00-00
Page 2 Rev. 24 15 SEP 2016 Export Classification C, ECCN EAR99
REVISION
NO. DATE OF SIGNATURE FAA/ODA* SIGNATURE
Original 1 January 1981
1 15 May 1981
2 15 November 1981
3 24 February 1982
4 9 November 1982
5 9 December 1982
6N/A N/A
7 31 March 1983
8N/A N/A
9N/A N/A
10 20 October 1983
11 N/A N/A
12 N/A N/A
13 N/A N/A
14 30 July 1984
15 N/A N/A
16 19 November 1984
17 N/A N/A
18 3 June 1987

FAA APPROVED BHT-412-MM-2
4-00-00
15 SEP 2016 Rev. 24 Page 3
Export Classification C, ECCN EAR99
Reissue 29 March 1990
1 20 February 1991
2N/A N/A
3N/A N/A
Reissue N/A N/A
1N/A N/A
Reissue 23 June 1994
1 12 April 1995
2N/A N/A
3N/A N/A
4N/A N/A
5N/A N/A
6 1 October 2002
7N/A N/A
8N/A N/A
9N/A N/A
10 N/A N/A
11 30 March 2007
12 27 February 2009
13 N/A N/A
14 N/A N/A
REVISION
NO. DATE OF SIGNATURE FAA/ODA* SIGNATURE

BHT-412-MM-2 FAA APPROVED
4-00-00
Page 4 Rev. 27 25 SEP 2018 Export Classification C, ECCN EAR99
15 1 May 2012
16 N/A N/A
17 26 March 2013
18 N/A N/A
19 N/A N/A
20 N/A N/A
21 N/A N/A
22 N/A N/A
23 N/A N/A
24 15 September 2016
25 N/A
26 14 June 2018
27 25 SEP 2018
REVISION
NO. DATE OF SIGNATURE FAA/ODA* SIGNATURE

FAA APPROVED BHT-412-MM-2
4-00-00
25 SEP 2018 Rev. 27 Page 5
Export Classification C, ECCN EAR99
AIRWORTHINESS LIMITATIONS SCHEDULE
4-1. AIRWORTHINESS LIMITATIONS
SCHEDULE
The Airworthiness Limitations section is FAA approved
and specifies maintenance required under Secs. 43.16
and [91.403] of the Federal Aviation Regulations
unless an alternative program has been FAA
approved.
WARNING
ALL REPAIR AND OVERHAUL
PROCEDURES LIVES PUBLISHED BY
BELL HELICOPTER TEXTRON,
INCLUDING COMPONENT RETIREMENT
LIFE, ARE BASED SOLELY ON THE USE
OF BELL APPROVED PARTS AND
PROCESSES. IF PARTS OR
PROCESSES DEVELOPED OR
APPROVED BY PARTIES OTHER THAN
BELL HELICOPTER ARE USED, THEN
THE DATA PUBLISHED OR OTHERWISE
SUPPLIED BY BELL HELICOPTER ARE
NOT APPLICABLE. THE USER IS
WARNED TO NOT RELY ON BELL
HELICOPTER DATA FOR PARTS AND
PROCESSES NOT APPROVED BY BELL
HELICOPTER. ALL APPLICABLE
INSPECTIONS AND REPAIR METHODS
MUST BE OBTAINED FROM THE
SUPPLIER OF THE PARTS OR
PROCESSES NOT APPROVED BY BELL
HELICOPTER. BELL HELICOPTER IS
NOT RESPONSIBLE FOR PARTS OR
PROCESSES OTHER THAN THOSE
WHICH IT HAS ITSELF DEVELOPED OR
APPROVED.
WARNING
CONTINUED USE OF ANY TIME/
CALENDAR/RIN LIFE LIMITED
COMPONENT PAST ITS STATED LIMITS
IS NOT PERMITTED AS IT COULD
SERIOUSLY AFFECT THE
AIRWORTHINESS OF THE HELICOPTER.
THE COMPONENT MUST BE REMOVED
FROM THE HELICOPTER NOT LATER
THAN THE END OF THE LIFE LIMIT. IT
MUST EITHER BE MADE
UNSERVICEABLE OR MARKED IN A
CONSPICUOUS MANNER TO PREVENT
CONTINUED USE, EVEN INADVERTENT
USE.
WHEN A REPLACEMENT PART IS
INSTALLED, THE PART NAME, PART
NUMBER, SERIAL NUMBER, AND
CURRENT OPERATING HOURS, IF
APPLICABLE, MUST BE RECORDED IN
THE HISTORICAL SERVICE RECORD
FOR THE ASSEMBLY OR HELICOPTER.
The mandatory airworthiness limitations schedule
(Table 4-1) summarizes the mandatory maximum life,
in hours, years or by Retirement Index Number (RIN)
of components with a limited airworthiness life. Parts
that are not on the schedule have an unlimited
airworthiness life.
Refer to the engine manufacturer's publications for the
airworthiness limitations schedule of the engine and
components. For the PT6T-3 series engine, refer to
the Pratt and Whitney Service Bulletin No. 5002. For
the PT6T-9 Engine, refer to the Pratt and Whitney
Maintenance Manual airworthiness limitation section.
NOTE
The airworthiness life or inspection interval
for any part number contained in this
schedule applies to all the successive dash
numbers for that component unless it is
otherwise specified.

BHT-412-MM-2 FAA APPROVED
4-00-00
Page 6 Rev. 27 25 SEP 2018 Export Classification C, ECCN EAR99
WARNING
SOME PARTS ARE INSTALLED AS
ORIGINAL EQUIPMENT ON BOTH
MILITARY AND COMMERCIAL
HELICOPTERS AND MAY HAVE A
LOWER AIRWORTHINESS LIFE AND/OR
OVERHAUL SCHEDULE WHEN USED
ON A MILITARY HELICOPTER. IN
ADDITION, CIRCUMSTANCES
SURROUNDING THEIR USE MAY CALL
FOR OPERATION OF THE MILITARY
HELICOPTER OUTSIDE OF THE
APPROVED COMMERCIAL FLIGHT
ENVELOPE. CONSEQUENTLY, PARTS
THAT HAVE BEEN USED ON MILITARY
HELICOPTERS SHOULD NOT BE USED
ON COMMERCIAL HELICOPTERS.
CAUTION
AIRWORTHINESS LIFE OF SOME KIT
COMPONENTS MAY NOT BE COVERED
IN THIS SCHEDULE. REFER TO
APPLICABLE SERVICE INSTRUCTION
(SI) OR MAINTENANCE MANUAL
SUPPLEMENT (MMS) FOR KIT
COMPONENTS SCHEDULE.
NOTE
The airworthiness life given or the failure to
give an airworthiness life to 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 airworthiness lives given to the components and
assemblies are determined by experience, tests and
the judgement of Bell Helicopter engineers. The
airworthiness lives and inspection intervals cannot be
changed without the approval of the FAA.
Prior to disposing of unsalvageable helicopter parts
and materials, caution should be exercised to ensure
that the parts and materials are disposed of in a
manner that does not allow them to be returned for
service. Refer to FAA Advisory Circular 21-38 for
guidance on the disposal of unsalvageable aircraft
parts and materials.
Table 4-1. Airworthiness Limitations Schedule
NOMENCLATURE PART NUMBER AIRWORTHINESS LIFE
MAIN ROTOR HUB
Yoke Assembly 412-010-101-109 700 hours
Yoke Assembly 412-010-101-123 5000 hours
Yoke Assembly 412-010-101-137 4500 hours
Yoke Assembly 412-010-101-139 3000 hours
Spindle Assembly 412-010-156-105 5000 hours
Spindle and Damper Bearing Assembly 412-010-190-101 5000 hours
Spindle and Damper Bearing Assembly 412-010-190-103 10,000 hours
Spindle and Shear Bearing Assembly 412-310-102-101 10,000 hours
1
5
7
38
5
33
5
7
22

FAA APPROVED BHT-412-MM-2
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Export Classification C, ECCN EAR99
MAIN ROTOR HUB (CONT)
Pitch Horn Assembly 412-010-149-105 5000 hours
Pitch Horn Assembly 412-010-149-111 15,000 hours
Retention Bolt 412-010-124-105 5000 hours
Retention Bolt (Expandable) 412-010-137-103 5000 hours
Damper Bridge 412-010-104-101 5000 hours
Damper Bridge 412-010-183-101 10,000 hours
Damper Bridge 412-010-183-109 15,000 hours
Damper Bridge 412-010-185-101 10,000 hours
Damper Bridge 412-010-185-109 15,000 hours
Damper Bridge 412-018-068-101 10,000 hours or
180 months
Damper Bridge 412-010-170-101 10,000 hours or
180 months
Pivot Bearing 412-010-106-101 On condition
Fitting 412-010-111-101 5000 hours
Damper Yoke Set 412-010-145-101 On condition
Damper Yoke Set 412-310-146-103 On condition
MAIN ROTOR DROOP RESTRAINT
Bolt (8) MS-21250-H05-006 120 months
MAIN ROTOR SIMPLE PENDULUM ABSORBERS
Bolt, Bracket (16) EWB0420D-7-36 15,000 hours
MAIN ROTOR CONTROLS
Rephasing Lever Assembly 412-010-403-109 1250 hours
Rephasing Lever Assembly 412-010-403-113 5000 hours
Drive Link Assembly 412-010-405-101 5000 hours
Swashplate Outer Ring 412-010-407-105 2500 hours
Table 4-1. Airworthiness Limitations Schedule (Cont)
NOMENCLATURE PART NUMBER AIRWORTHINESS LIFE
1
27
2
2
4
4
4
2
32

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MAIN ROTOR CONTROLS (CONT)
Swashplate Outer Ring 412-010-407-117 10,000 hours
Pitch Link Rod End Bearing 412-010-412-101 5000 hours
Pitch Link Rod End Bearing 412-010-438-101 5000 hours
Swashplate Link Rod End Bearing 412-010-412-101 5000 hours
Swashplate Link Rod End Bearing 412-010-448-101 5000 hours
Swashplate Link Rod End Bearing 412-310-400-103 5000 hours
Swashplate Support Assembly 412-010-409-105 5000 hours
Swashplate Support Assembly 412-010-443-101 5000 hours
Swashplate Support Assembly 412-010-453-101 5000 hours
Swashplate Support Assembly 412-010-453-105 15,000 hours
Gimbal Ring Assembly 204-010-404-001 9000 hours
Gimbal Ring Assembly 212-010-416-101 9000 hours
Collective Sleeve 204-011-408-003 9000 hours
Collective Sleeve 212-011-412-101 9000 hours
Collective LeverAssembly 412-010-408-101 10,000 hours
Collective Lever Assembly 412-010-408-105 2500 hours
Collective LeverAssembly 412-010-464-101 20,000 hours
Collective Lever Pin 412-010-465-101 20,000 hours
MAIN ROTOR CONTROL SYSTEM BOLTS
Pitch Horn to Pitch Link (4) 20-057-5-25D 2500 hours
Pitch Horn to Pitch Link (4) 20-057-5-28D 2500 hours
Pitch Link-to-Rephasing Lever (4) 20-057-6-36D 2500 hours
Pitch Link-to-Rephasing Lever (4) 20-057-6-52D 2500 hours
Drive Link-to-Rephasing Lever (4) 20-057-6-36D 2500 hours
Swashplate Link-to-Rephasing Lever (3) 20-057-6-38D 2500 hours
Swashplate Link-to-Rephasing Lever (2) 20-057-6-52D 2500 hours
Table 4-1. Airworthiness Limitations Schedule (Cont)
NOMENCLATURE PART NUMBER AIRWORTHINESS LIFE
1
24
36
35
37
39
40
19
28
29
30
28
29
30
29
30
28
29
30
28
29
30
29
30