HELICOPTER TEXTRON INC.
AND BELL HELICOPTER TEXTRON
CANADA LTD.
ALL RIGHTS RESERVED
MAINTENANCE MANUAL
GENERAL INFORMATION
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. This manual covers 206A, 206B, and 206B3
helicopters SN 4 through and including current production. TH-57/TH-67 helicopters are covered along
with the use of manual supplements. 206B1 helicopters are not covered by this manual.
FOR MODELS 206A, 206B, AND 206B3 HELICOPTERS
Export Classification C, ECCN EAR99
VOLUME 1
NOTICE
7 JANUARY 1998
REVISION 16 — 25 JUNE 2019
BHT-206A/B-SERIES-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:
PNRev. 1625 JUN 2019
Commercial Publication Distribution Center
Bell Helicopter Textron Inc.
P. O. Box 482
Fort Worth, Texas 76101-0482
Export Classification C, ECCN EAR99
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-206A/B-SERIES-MM-1
Export Classification C, ECCN EAR99
25 JUN 2019Rev. 16W arning
BHT-206A/B-SERIES-MM-1
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:
Model 206, 407, or 505
Phone:450-437-2862 or 800-363-8023 ( U.S./Canada)
Fax:450-433-0272
E-mail:productsupport@bellflight.com
Model 222, 230, 427, 429, or 430
Phone:450-437-2077 or 800-463-3036 ( U.S./Canada)
Fax:450-433-0272
E-mail:productsupport@bellflight.com
Model 204, 205, 212, or 412
Phone:450-437-6201 or 800-363-8028 ( U.S./Canada)
Fax:450-433-0272
E-mail:productsupport@bellflight.com
Model 210, HUEY II, and All Bell’s Active and
Military Medium Helicopter Models
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.bellhflightcom/support-and-service/support.
CSSRev. 1625 JUN 2019Export Classification C, ECCN EAR99
BHT-206A/B-SERIES-MM-1
LOG OF REVISIONS
Insert latest revision pages and dispose of superseded ones.
On a revised page, the text and/or illustration affected by the latest revision is shown by a vertical line. A revised
page with only a vertical line next to the page number indicates that text has shifted or that non-technical
correction(s) were made on that page.
Reference No. (your initials and date): _____________________________________
(If you choose to mail this form, fold in thirds with address exposed, tape and mail.)
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12,800 rue de l’Avenir
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TAPE HERE
Export Classification C, ECCN EAR99
IMPORTANT
HELICOPTER SALES NOTICE
Please complete this form and return by mail, e-mail (publications@bHOOIOLJKW.com), or fax
(817-280-6466, Attention: CPDC). This will ensure that the new owners/operators receive
updates to their BellHelicopter 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 _______________________________________________________
Register for access to electronic publications at www.bellIOLJKW.FRP
Export Classification C, ECCN EAR99
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FORT WORTH, TEXAS 76101-0482
FOLD ON DOTTED LINES AND TAPE
BUSINESS REPLY MAIL
FIRST CLASS PERMIT NO. 1744 FORT WORTH, TEXAS
Export Classification C, ECCN EAR99
BHT-206A/B-SERIES-MM-1
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.
The Airworthiness Limitations Schedule is approved by the Minister and specifies the maintenance required by
any applicable airworthiness or operational rules unless an alternative program has been approved by the
Minister.
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.
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 requirements stated in Chapter 5 are to
be complied with and the appropriate
maintenance actions are to be performed.
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.
The mandatory airworthiness limitations schedule
(Table 4-1) summarizes the mandatory maximum life,
in hours, years (months) 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.
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
Export Classification C, ECCN EAR99
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
4-00-00
25 JUN 2019Rev. 16Page 5
BHT-206A/B-SERIES-MM-1TC APPROVED
CAUTION
NOTE
1
2
3
6
192019
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.
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.
Agreement for the helicopter or the
component.
The airworthiness lives given to the components and
assemblies are determined by experience, tests and
the judgment of Bell Helicopter engineers. The
airworthiness lives and inspection intervals cannot be
changed without the approval of the Minister of
Transport Can ada.
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 helicopter
parts and materials.
The airworthiness life given or the failure to
give an airworthiness life to a component
does not constitute a warranty of any kin d.
The only warranty applicable to the
helicopter or any component is the
warranty included in the Purchase
Emergency Floats Cylinder206-073-919-001/-003/-005/-00710 years
Emergency Floats Cylinder206-073-922-10110 years
Emergency Floats Cylinder206-073-929-003/-101/-10310 years
Emergency Floats Cylinder206-073-930-10110 years
Emergency Floats Cylinder1269556-3/-415 years
Emergency Floats Cylinder2371198215 years
Emergency Floats Cylinder27464515 years
Squib, Emergency Floats9445515 years
Squib, Emergency Floats2902296815 years
Hoist Cable Cutter AssemblyY-1265-11-1
POWER PLANT
Turboshaft Engine250-C18 SeriesRefer to Rolls-Royce 250-C18 Series
Operation and Maintenance Manual,
5W2
Turboshaft Engine250-C20 SeriesRefer to Rolls-Royce 250-C20 Series
Operation and Maintenance Manual,
10W2
AIRFRAME
Pylon Support Link206-031-508-005/-007
NOTES:
Airworthiness limitation for part number listed applies to all successive dash numbers for that component
unless otherwise specified.
Main rotor yokes 206-010-101-125/-129 are not listed and are conditional. All yokes listed have a 10-year
airworthiness life. Yokes in use as of 17 July 1979, with less than 5 years in service, shall be remove d after
10 years. Yokes in use as of 17 July 1979, with more than 5 years in service, will have been removed by
1 January 1984. Refer to ASB 206-79-4, dated 17 July 1979.
Main rotor trunnions 206-010-104 and 206-011-113-001 with more than 2400 hours in service, or time in
use unknown, will have been removed from service by 1 September 1981. Refer to ASB 206-80-7 Rev. B,
dated 15 October 1980.
Strap retention fittings 206-010-155-011/-015 will have been removed from service no later than
1 January 1979. Refer to ASB 206-76-7, dated 13 August 1976 and note .
Main rotor grip 206-011-132-009, with serial numbers listed below, have a 1200-hour airworthiness life.
The serial numbers not listed below have a 4800-hour airworthiness life. These parts are originally
delivered on Bell 206L1, but could have found their way to the 206A/B series. Refer to ASB 206L-80-15,
dated 29 July 1980.
Tension torsion straps 206-010-105-003/-005 will have been removed from service no later than
1 January 1979. Refer to ASB 206-78-1, dated 14 April 1978 and FAA AD 78-11-02 R1, dated
15 December 1988.
Tension torsion straps 206-011-147 and 206-011-154 have airworthiness lives of 1200 hours or 24
months, whichever occurs first. The calendar life of 24 months starts when new straps ar e installed in a
main rotor hub and blade assembly, and are subjected to rotation on the helicopter. Refer to ASB
206-80-9, dated 3 June 1980.
Main rotor blade 206-010-200-029 will have been retired no later than 31 March 1976. Refer to
ASB 206-75-10, dated 13 November 1975.
Swashplate supports 206-010-452-001/-005/-10 9 with more than 1500 hours in service are subjected to
a visual inspection every 50 hours. The supports may remain in service until a crack is found or until a
total of 4800 hours time in service is accumulated. Refer to ASB 206-93-74 Rev. B, dated 4 April 1994.
Tail rotor blade 206-010-750 will have been retired no later than 1 July 1981. Refer to ASB 206-80-12,
dated 9 September 1980.
Tail rotor yokes 206-010-788, 206-011-802 and trunnions 206-010-776-001, 206-011-803-001 are not
authorized after 1 July 1981. Yokes are to be replaced concurrently with the replacement of tail rotor
blade 206-010-750. See also note . Refer to ASB 206-75-4, dated 15 May 1975.
Tail rotor yokes 206-011-811-001/-005 are not authorized after 1 July 19 8 1. Yokes were reidentified as
206-011-811-123/-125 concurrently with the replacement of tail rotor blade 206-010-750. Yokes that
have been reidentified have an 1800-hour airworthiness life starting with the reidentification. Refer also
to note .
Aluminum links 206-031-508-005/-007 have been removed from service. Refer to ASB 206-01-73-6,
dated 19 September 1973 and FAA AD 73-8-3, dated 18 April 1973.
Duplex bearings 206-040-410-001/-103 installed in tail rotor gearbox 206-040-400-(ALL) are
conditional. Duplex bearings 206-040-410-003/-005/-101 installed in tail rotor gearbox
206-040-402-(ALL) have a life of 3000 hours.
Part of squib assembly 30908. Retire squib no later than 15 years after date of manufacture . Dispose of
time expired squib in accordance with local regulations.
Selected serial numbers of main rotor trunnion 206-011-113-103 will have been removed from service
no later than 30 November 1994. Refer to ASB 206-94-80, dated 5 August 1994 for list of serial
numbers affected.
Latch bolts 206-011-260-101/-103 that have a serial number with the prefix “SC”, purchased as spares
will have been removed from service no later than 3 December 1992. Refer to ASB 206-92-70, dated
3 December 1992.
Selected serial numbers of tail rotor hub assemblies 206-011-810-015 and tail rotor yokes
206-011-811-009 must be removed from service. Refer to ASB 206-89-47 Rev . A, dated
29 August 1989 for list of serial numbers affected.
Strap retention pin 206-010-123-001 and fitting 206-010-155-007 have been removed from service.
Refer to FAAAD 72-19-1, dated 7 September 1972.
Refer to ASB 206(04-1)-73-1, dated 25 June 1973.
Crosstube assemblies 206-050-107-(ALL) and 206-050-119-(ALL) must be removed from service.
Refer to ASB 206-94-78, dated 11 April 1994.
Usable only with main rotor hub 206-011-100-127. Refer to TB 206-91-133 Rev. A, dated 1 July 1998.
Usable only on model 206B, S/N 5101 and subsequent. These part numbers are reserved for US Army ,
model TH-67 training helicopters. Refer to ASB 206-96-87 Rev. A, dated 22 March 1996.
Oil cooler impeller 206-061-432-011 will have been removed from service no later than 1 March 1978.
Refer to ASB 206-77-10 Rev. A, dated 21 February 1978.
Selected serial numbers of tail rotor yokes 206-011-819-101 must be removed from service. Refer to
ASB 206-88-41, dated 28 January 1988 for list of serial numbers affected.
Selected serial numbers of tension torsion straps 206-011-147-007 and 206-011-154-101/-105 must be
removed from service. Refer to ASB 206-89-46 Rev. A, dated 29 August 1989 for list of serial numbers
affected.
Selected serial numbers of main rotor blades 2 06-010-200 -033 must be removed from service. Refe r to
ASB 206-89-50 Rev. A, dated 29 November 1989 for list of serial numbers affected.
Selected serial numbers of tail rotor blades 206-016-201-113/-127 must be remove d from service. Refer
to ASB 206-90-57, dated 27 June 1990 for list of serial numbers affected.
Selected serial numbers of tail rotor blades 2 06-016-201-125/-12 7 must be removed from service. Re fer
to ASB 206-90-58 Rev. A, dated 31 October 1990 for list of serial numbers affected.
Refer to ASB 206A-12 Rev. A, dated 8 April 1970. Servo actuator 206-076-023 is equivalent to
Hydraulic Research part number 41103750 and servo actuator 206-076-024 is equivalent to Hydraulic
Research part number 41103650.
Refer to ASB 206A-14 Rev. A, dated 8 April 1970.
Cyclic control bellcrank support assembly 206-001-521-005/-006 will have been removed from service
no later than 15 July 1969. Refer to ASB 206A-11 Rev. B, dated 29 September 1969.
Masts 206-010-332-005/-009/-013/-017/-121 a re not listed and are cond itional. Selected serial numbers
of main rotor mast 206-010-332-121 will have been returned to Bell Helicopter Textron for metallurgical
evaluation no later than 31 May 1987. Affected masts inspected at BHT and found to be acceptable
have a suffix “U” added to the serial number. Refer to ASB 206-87-37, dated 23 April 1987 for list of
serial numbers affected.
Selected serial numbers of sun gear 206-040-662-101 will have been removed from service no later
than 15 January 1991. Refer to ASB 20 6-90-56 Rev. A, dated 15 January 1991 for list of serial numbers
affected.
Fixed float landing gear crosstubes 206-050-169-001/-003 must be removed from service. Refer to
ASB 206-94-81 Rev. A, dated 17 August 1994.
Emergency flotation landing gear crosstubes 206-050-134-001/-003/-005/-007/-011/-103/-105 must be
removed from service. Refer to ASB 206-94-82 Rev. A, dated 17 April 1995.
Emergency lightweight flotation landing gear crosstubes 206-050-107-025/-027/-119/-121 must be
removed from service. Refer to ASB 206-94-83, dated 6 September 1994.
Fixed float landing gear crosstubes 206-050-157-001/-003 must be removed from service. Refer to
ASB 206-96-88, dated 3 June 1996.
Usable only on model 206A, S/N 5001 through 5040. These part numbers are reserved for US Army,
model TH-57 training helicopters.
Cylinder per DOT-3HT and DOT-E7218 specifications. Refer to IL GEN-93-52, dated 21 June 1993.
Cylinder per FAA specifications. Refer to IL GEN-93-52, dated 21 June 1993.
Upper collective tube 206-001-024-029 is not listed and is conditional.
Main rotor latch bolts 206-010-169-001/-003 and 206 -011-122-003 must be remove d from service.
Refer to ASB 206-06-109, dated 25 July 2006, and Transport Canada AD CF-2006-23, dated
6 November 2006.
Part of squib assembly 29022971 and approved alternate for squib 30908. Retire squib no later than
15 years after date of manufacture. Dispose of time expired squib in accordance with local regulations.
Storage life of cutter assembly Y-1265-11-1, in original sealed container, is set at 60 months. Service life
is 36 months from the time the cutter assembly is removed from the original sealed container. The
36-month service life must be contained within the 60 -month storag e life. Dispose of time e xpired squ ib
in accordance with local regulations.
Example 1 – Cutter assembly stored for 24 months: 60 - 24 = 36-month service life.
Example 2 – Cutter assembly stored for 48 months: 60 - 48 = 12-month service life.
Example 3 – Cutter assembly stored for 1 month: 60 - 1 = 59 months, reduced to 36 months maximum
service life.
Main rotor hub tension torsion straps 206-310-004 have an airworthiness life of 1200 hours or 48
months, whichever occurs first. The calendar life of 48 months starts when new straps are insta lled in a
main rotor hub and blade assembly, and are subjected to rotation on the helicopter.
4-00-00
Page 14Rev. 1625 JUN 2019Export Classification C, ECCN EAR99
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