Chapter 4 - Airworthiness Limitations Schedule
Chapter 4 - Airworthiness Limitations Schedule
Chapter 4 - Airworthiness Limitations Schedule
TABLE OF CONTENTS
TABLES
Table Page
Number Title Number
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.
Chief Engineering
Aircraft Certification
Transport Canada
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1 21 May 2002
2 N/A N/A
3 N/A N/A
4 N/A N/A
5 N/A N/A
6 7 December 2009
7 N/A N/A
8 N/A N/A
9 N/A N/A
10 8 April 2011
11 13 October 2011
12 1 June 2012
13 7 November 2012
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14 N/A N/A
15 N/A N/A
16 25 JUNE 2019
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W H E N A R E P L A C E M E N T PA R T I S
WARNING INSTALLED, THE PART NAME, PART
NUMBER, SERIAL NUMBER, AND
C U R R E N T O P E R AT I N G H O U R S , I F
A L L R E PA I R A N D O V E R H A U L APPLICABLE, MUST BE RECORDED IN
PROCEDURES LIVES PUBLISHED BY THE HISTORICAL SERVICE RECORD
BELL HELICOPTER TEXTRON, FOR THE ASSEMBLY OR HELICOPTER.
INCLUDING COMPONENT RETIREMENT
LIFE, ARE BASED SOLELY ON THE USE
NOTE
O F B E L L A P P R O V E D PA R T S A N D
PROCESSES. IF PA R T S OR The requirements stated in Chapter 5 are to
PROCESSES DEVELOPED OR be complied with and the appropriate
APPROVED BY PARTIES OTHER THAN maintenance actions are to be performed.
BELL HELICOPTER ARE USED, THEN
THE DATA PUBLISHED OR OTHERWISE NOTE
SUPPLIED BY BELL HELICOPTER ARE
NOT APPLICABLE. THE USER IS The airworthiness life or inspection interval
WA R N E D T O N O T R E LY O N B E L L for any part number contained in this
HELICOPTER DATA FOR PARTS AND schedule applies to all the successive dash
PROCESSES NOT APPROVED BY BELL numbers for that component unless it is
HELICOPTER. ALL APPLICABLE otherwise specified.
INSPECTIONS AND REPAIR METHODS
M U S T B E O B TA I N E D F R O M T H E The mandatory airworthiness limitations schedule
S U P P L I E R O F T H E PA R T S O R (Table 4-1) summarizes the mandatory maximum life,
PROCESSES NOT APPROVED BY BELL in hours, years (months) or by Retirement Index
HELICOPTER. BELL HELICOPTER IS Number (RIN) of components with a limited
NOT RESPONSIBLE FOR PARTS OR airworthiness life. Parts that are not on the schedule
PROCE SSE S OTHER THA N THOS E have an unlimited airworthiness life.
WHICH IT HAS ITSELF DEVELOPED OR
APPROVED. Refer to the engine manufacturer's publications for the
airworthiness limitations schedule of the engine and
components.
WARNING
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SURROUNDING THEIR USE MAY CALL Agreement for the helicopter or the
FOR OPERATION OF THE MILITARY component.
HELICOPTER OUTSIDE OF THE
APPROVED COMMERCIAL FLIGHT The airworthiness lives given to the components and
ENVELOPE. CONSEQUENTLY, PARTS assemblies are determined by experience, tests and
THAT HAVE BEEN USED ON MILITARY the judgment of Bell Helicopter engineers. The
HELICOPTERS SHOULD NOT BE USED airworthiness lives and inspection intervals cannot be
changed without the approval of the Minister of
ON COMMERCIAL HELICOPTERS.
Transport Canada.
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
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POWER TRAIN
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MISCELLANEOUS
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MISCELLANEOUS (CONT)
POWER PLANT
AIRFRAME
NOTES:
1 Airworthiness limitation for part number listed applies to all successive dash numbers for that component
unless otherwise specified.
2 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 removed 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.
3 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.
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NOTES (CONT):
4 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 6 .
5 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.
6 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.
7 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 are 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.
8 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.
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NOTES (CONT):
9 Swashplate supports 206-010-452-001/-005/-109 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.
10 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.
11 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 10 . Refer to ASB 206-75-4, dated 15 May 1975.
12 Tail rotor yokes 206-011-811-001/-005 are not authorized after 1 July 1981. 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 10 .
13 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.
15 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.
16 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.
17 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.
18 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.
19 Strap retention pin 206-010-123-001 and fitting 206-010-155-007 have been removed from service.
Refer to FAA AD 72-19-1, dated 7 September 1972.
22 Usable only with main rotor hub 206-011-100-127. Refer to TB 206-91-133 Rev. A, dated 1 July 1998.
23 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.
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NOTES (CONT):
24 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.
25 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.
26 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.
27 Selected serial numbers of main rotor blades 206-010-200-033 must be removed from service. Refer to
ASB 206-89-50 Rev. A, dated 29 November 1989 for list of serial numbers affected.
28 Selected serial numbers of tail rotor blades 206-016-201-113/-127 must be removed from service. Refer
to ASB 206-90-57, dated 27 June 1990 for list of serial numbers affected.
29 Selected serial numbers of tail rotor blades 206-016-201-125/-127 must be removed from service. Refer
to ASB 206-90-58 Rev. A, dated 31 October 1990 for list of serial numbers affected.
30 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.
32 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.
33 Masts 206-010-332-005/-009/-013/-017/-121 are not listed and are conditional. 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.
34 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 206-90-56 Rev. A, dated 15 January 1991 for list of serial numbers
affected.
35 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.
38 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.
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NOTES (CONT):
39 Usable only on model 206A, S/N 5001 through 5040. These part numbers are reserved for US Army,
model TH-57 training helicopters.
40 Cylinder per DOT-3HT and DOT-E7218 specifications. Refer to IL GEN-93-52, dated 21 June 1993.
43 Main rotor latch bolts 206-010-169-001/-003 and 206-011-122-003 must be removed from service.
Refer to ASB 206-06-109, dated 25 July 2006, and Transport Canada AD CF-2006-23, dated
6 November 2006.
44 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.
45 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 storage life. Dispose of time expired squib
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.
46 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 installed in a
main rotor hub and blade assembly, and are subjected to rotation on the helicopter.
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