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2002-23-06: Crankshaft gear retaining bolts

FAA order 2002-23-06 is an airworthiness directive in force since November 19, 2002. The FAA's subject line: Crankshaft gear retaining bolts. It names the Lycoming AEIO-540-D4A5, Lycoming AEIO-540-D4B5, Lycoming AEIO-540-L1B5, Lycoming AEIO-540-L1B5D, Lycoming AEIO-540 series, Lycoming IO-540 series, Lycoming LTIO-540-F2BD, Lycoming LTIO-540-J2BD, Lycoming O-540 series, Lycoming TIO-540-A1A, Lycoming TIO-540-A2B, Lycoming TIO-540-A2C, Lycoming TIO-540-AA1AD, Lycoming TIO-540-AB1BD, Lycoming TIO-540-AE2A, Lycoming TIO-540-AF1A, Lycoming TIO-540-AF1B, Lycoming TIO-540-AG1A, Lycoming TIO-540-AH1A, Lycoming TIO-540-AK1A, Lycoming TIO-540-C1A, Lycoming TIO-540-F2BD, Lycoming TIO-540-J2B, Lycoming TIO-540-J2BD, Lycoming TIO-540-K1AD, Lycoming TIO-540-R2AD, Lycoming TIO-540-S1AD, Lycoming TIO-540 series, Lycoming TIO-540-U2A, Lycoming TIO-540-V2AD engines: about 16,324 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: engine.

What it applies to as the FAA lists it

Kind of product
Engine
Makes
Textron Lycoming, AVCO Corporation; Lycoming Engines
Models
AEIO-540, AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5, AEIO-540-D4D5, AEIO-540-L1B5, AEIO-540-L1B5D, AEIO-540-L1D5, IO-540 Series (all), LTIO-540-F2BD, LTIO-540-J2B, LTIO-540-J2BD, LTIO-540-K1AD, LTIO-540-N2BD, LTIO-540-R2AD, LTIO-540-U2A, LTIO-540-V2AD, LTIO-540-W2A, O-540 Series (all), TIO-540-A1A, TIO-540-A1B, TIO-540-A1C, TIO-540-A2A, TIO-540-A2B, TIO-540-A2C, TIO-540-AA1AD, TIO-540-AB1AD, TIO-540-AB1BD, TIO-540-AE2A, TIO-540-AF1A, TIO-540-AF1B, TIO-540-AG1A, TIO-540-AH1A, TIO-540-AK1A, TIO-540-C1A, TIO-540-E1A, TIO-540-F2BD, TIO-540-G1A, TIO-540-H1A, TIO-540-J2B, TIO-540-J2BD,...
Engine series
Lycoming AEIO-540-D4A5 57 aircraft
Lycoming AEIO-540-D4B5 3 aircraft
Lycoming AEIO-540-L1B5 56 aircraft
Lycoming AEIO-540-L1B5D 41 aircraft
Lycoming AEIO-540 series 434 aircraft
Lycoming IO-540 series 4,222 aircraft
Lycoming LTIO-540-F2BD 1 aircraft
Lycoming LTIO-540-J2BD 5 aircraft
Lycoming O-540 series 5,245 aircraft
Lycoming TIO-540-A1A 5 aircraft
Lycoming TIO-540-A2B 4 aircraft
Lycoming TIO-540-A2C 6 aircraft
Lycoming TIO-540-AA1AD 2 aircraft
Lycoming TIO-540-AB1BD 1 aircraft
Lycoming TIO-540-AE2A 488 aircraft
Lycoming TIO-540-AF1A 3 aircraft
Lycoming TIO-540-AF1B 15 aircraft
Lycoming TIO-540-AG1A 1 aircraft
Lycoming TIO-540-AH1A 89 aircraft
Lycoming TIO-540-AK1A 508 aircraft
Lycoming TIO-540-C1A 10 aircraft
Lycoming TIO-540-F2BD 4 aircraft
Lycoming TIO-540-J2B 6 aircraft
Lycoming TIO-540-J2BD 24 aircraft
Lycoming TIO-540-K1AD 1 aircraft
Lycoming TIO-540-R2AD 1 aircraft
Lycoming TIO-540-S1AD 13 aircraft
Lycoming TIO-540 series 5,074 aircraft
Lycoming TIO-540-U2A 3 aircraft
Lycoming TIO-540-V2AD 2 aircraft

Dates and paperwork

In force since
November 19, 2002
Published
November 14, 2002 (signed November 8, 2002)
Docket
2002-NE-31-AD
Replaces
2002-20-51
Replaced by
2004-05-24
Status
Historical
The FAA's document
Read the order on the FAA's site

The FAA's summary their words, unchanged

This amendment supersedes an emergency airworthiness directive (AD) that was sent previously to all known U.S. owners and operators of Textron Lycoming (T/L) AEIO-540, IO-540, LTIO-540, O-540, and TIO-540 series reciprocating engines. That action requires replacing certain zinc-plated crankshaft gear retaining bolts. This action still requires replacing certain zinc-plated crankshaft gear retaining bolts, but expands the population of affected engines. This amendment is prompted by two recent failures of zinc-plated crankshaft gear retaining bolts, and a reassessment of the extent to which the suspect bolts may still be present in the field. The actions specified by this AD are intended to prevent loss of all engine power and possible forced landing.

The order itself the regulatory text, as published

Show the full text (7,951 characters)
2002-23-06 Textron Lycoming: Amendment 39-12950. Docket 2002-NE-31-AD. Supersedes emergency AD 2002-20-51. Applicability: This airworthiness directive (AD) is applicable to all Textron Lycoming AEIO-540, IO-540, LTIO-540, O-540, and TIO- 540 series reciprocating engines with crankshaft gear retaining bolts, part number (P/N) STD-2209 installed, except O-540-F series engines to which AD 99-03-05 applies and on which the bolt has not been subsequently replaced with a bolt other than one included in gear bolt replacement kit 05K19987, and engines with single-drive dual magnetos. These engines are installed on, but not limited to the following aircraft: Aero Commander. (500), (500-B), (500-E), (500-U) Aero Mercantil. Gavilan Aerofab. Renegade 250 Bellanca Aircraft. Aries T-250 Britten-Norman. (BN-2) Cessna Aircraft. Skylane C-182, Stationair C-206, Turbo Skylane T182T, Turbo Stationair T-206 Christen. Pitts (S-2S), (S-2B) Commander Aircraft. 114TC, 114B DeHavilland. (DH-114-2X) Dornier. (DO-28-B1) Evangel-Air. Extra-Flugzeugbau. Extra 300. Found Bros. (FBA-2C), Centennial (100) Gippsland. GA-200. Helio. Military (H-250). King Engineering. Angel. Maule. MT-7-260, M-7-260, MX-7-235, MT-7-235, M7-235, Star Rocket (MX-7-235), Super Rocket (M-6-235), Super Std. Rocket (M-7-235). Mooney Aircraft. "TLS" M20M. Moravan. Zlin-50L Pilatus Britten-Norman. Islander (BN-2A-26), Islander (BN-2A-27), Islander II (BN-2B-26), Islander (BN-2A-21), Trislander (BN-2A-Mark III- 2), Islander (BN-2B). Piper Aircraft. 700P Aerostar, Aerostar 600A, Aerostar 601B, Aerostar 601P, Apache (PA-23 "235"), Aztec (PA-23 "250"), Aztec (PA-23 "250"), Comanche (PA-24 "250"), Comanche (PA-24 "260"), Aztec F, Aztec C (PA-23 "250"), Cherokee (PA-24 "250"), Cherokee (PA-28 "235"), Cherokee Six (PA-32 "260"), Cherokee Six (PA-32-300). "LANCE", Comanche (PA-24 "150"), Comanche (PA-24 "250"), Comanche (PA-24), Comanche (PA-24 "260"), Comanche 260, Mirage (PA-46-350P), Navajo(PA-31), Navajo (PA-31-300), Navy Aztec (PA-23 "250"), Pawnee (PA-24 "235"), Pawnee (PA-25 "260"), Saratoga (PA-32-300), Brave 300, Sequoia 602P, T-1020, T35, Turbo Aztec (PA-23-250), Turbo Saratoga TC (PA-32-301T) S.O.C.A.T.A. Rallye 235CA., Rallye 235GT, Rallye 235C, TB-20 Note 1: This AD applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (h) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions toaddress it. Compliance: Compliance with this AD is required as indicated, unless already done. To prevent loss of all engine power and possible forced landing, do the following: Engines That Have Complied With Emergency AD 2002-20-51 (a) For AEIO-540, LTIO-540, IO-540, O-540, and TIO-540 series engines that have complied with emergency AD 2002-20-51 by installing a bolt included in bolt replacement kit 05K19987, no further action is required. (b) For AEIO-540, LTIO-540, IO-540, O-540, and TIO-540 series engines that have complied with emergency AD 2002-20-51 but did not install a bolt included in bolt replacement kit 05K19987, within 10 hours time-in-service or 10 days after the effective date of this AD, whichever is earlier, replace the crankshaft gear retaining bolt with a new bolt included in gear bolt replacement kit, 05K19987, supplied by Textron Lycoming. Information on replacing the retaining bolt may be found in Lycoming SB No. 554, dated September 30,2002. Engines Listed by Serial Number (SN) (c) For AEIO-540, LTIO-540, IO-540, O-540, and TIO-540 engines with a single-drive dual magneto, and all O-540-F engines to which AD 99-03-05 applies and on which the bolt has not been subsequently replaced with a bolt other than one included in gear bolt replacement kit 05K19987, including any O-540-F engines that are listed by SN in Table 1 of Lycoming SB No. 554, dated September 30, 2002, no further action is required. (d) Before further flight, for all other engines, replace the crankshaft gear retaining bolt with a new bolt included in gear bolt replacement kit, 05K19987, supplied by Textron Lycoming if your engine SN is listed in Table 1 of Lycoming SB No. 554, dated September 30, 2002. Information on replacing the retaining bolt may be found in Lycoming SB No. 554, dated September 30, 2002. Bolts That Have Been Replaced During Field Maintenance or Field Overhaul (e) Replace the crankshaft gear retaining bolt witha new bolt supplied as part of gear bolt replacement kit 05K19987, supplied by Textron Lycoming, within 10 hours time-in-service or 7 days after the effective date of this AD, whichever is earlier,if: (1) The bolt on your O-540-F series was replaced after compliance with AD 99-03-05 with a bolt that was not included in bolt replacement kit 05K19987. Information on replacing the retaining bolt may be found in Lycoming SB No. 554, dated September 30, 2002. (2) The bolt on your AEIO, LTIO, IO, O, or TIO-540 series engine was replaced during field maintenance or field overhaul between November 27, 1996 and the effective date of this AD, or if your engine was repaired between November 27, 1996 and November 10, 1998, at Lycoming. Information on replacing the retaining bolt may be found in Lycoming SB No. 554, dated September 30, 2002. Recording Gear Bolt Replacement Kit Number (f) After the effective date of this AD, record the number of the gear bolt replacement kit, 05K19987, in the engine records when recording compliance with this AD. Prohibition Against Installing Gear Retaining Bolts P/N STD-2209 (g) After the effective date of this AD, do not install any crankshaft gear retaining bolt, P/N STD-2209, except one that is included in a Lycoming gear bolt replacement kit, 05K19987, onto any engine listed in this AD. Alternative Methods of Compliance (h) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, New York Aircraft Certification Office (NYACO). Operators must submit their requests through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, NYACO. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the NYACO. Special Flight Permits (i) Special flight permits may be issued in accordance with 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the aircraft to a location where the requirements of this AD can be done. Documents That Have Been Incorporated by Reference (j) Engine serial numbers are listed in Table 1 of Lycoming Service Bulletin No. 554, dated September 30, 2002. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Lycoming, a Textron Company, 652 Oliver Street, Williamsport, PA 17701; telephone (570) 323-6181. This information may also be obtained electronically on "http://www.lycoming.textron.com". Copies may be inspected at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street NW., suite 700, Washington, DC. Effective Date (k) This amendment becomes effective November 19, 2002.

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/2002-23-06.json · aircraft systems.