# AD 71-22-02: Cracks In Nose Gear Fork - Type: Airworthiness directive - Status: Current - Products: Cessna 150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L and 43 more - Effective: November 9, 1971 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-1327 - Registered aircraft: 41,427 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/59E323F41F570CD786256E01005AD6B1.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/71-22-02 ## The airworthiness directive 71-22-02 CESSNA: Amdt. 39-1323 as amended by amendment 39-1327. Applies to 150, 172, 175 and 182 series airplanes with 1000 or more hours' time in service with earlier type nose gear fork installed but does not include the above model airplanes installed with nose gear fork bearing P/Ns 0442503-497, 0543043-497 or 0543043-498, or newer nose gear forks identified in current Cessna Parts Catalogues. Compliance: Required as indicated, unless already accomplished. To decrease the possibility of failure of the nose gear structure: A) On or before January 1, 1972, and thereafter at intervals not to exceed 100 hours' time in service from the date of the previous inspection, or at any time following severe nose wheel shimmy and/or hard landings, inspect the nose gear fork for cracks in the radius of the milled section of the nose gear strut attachment bolt using the dye penetrant inspection or equivalent nondestructive inspection method. B) If cracks are found during the inspections required by Paragraph A, before further flight, replace the affected part with applicable nose gear fork P/N 0442503-497, 0543043-497 or 0543043-498 or newer nose gear forks identified in current Cessna Parts Catalogues. C) For those airplanes with 1500 or more total hours time in service as of January 1, 1972, and for those airplanes upon the accumulation of 1500 hours total time in service after January 1, 1972, within the first 300 hours time in service thereafter, replace earlier type forks with applicable nose gear fork P/N 0442503-497, 0543043-497, or 0543043-498 or newer nose gear forks identified in current Cessna Parts Catalogues. D) Upon incorporation of the applicable nose gear fork P/Ns 0442503-497, 0543043-497 or 0543043-498, or newer nose gear forks identified in current Cessna Parts Catalogues, compliance with the provisions of Paragraph A are no longer required. Cessna Service Letter 63-31 dated July 16, 1963, pertains to this same subject.Amendment 39-1323 became effective October 23, 1971. This amendment 39-1327 becomes effective November 9, 1971. ## Affected data sheets (4) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 3A13](https://openairdocs.org/tcds/3A13): Textron Aviation Inc.; names 19 of 23 models: 182D, 182A, 182J, 182P, 182B, 182L, 182G, 182Q… - [TCDS 3A12](https://openairdocs.org/tcds/3A12): Textron Aviation Inc.; names 18 of 18 models: 172F (USAF T-41A), 172M, 172Q, 172R, 172K, 172G, 172A, 172L… - [TCDS 3A19](https://openairdocs.org/tcds/3A19): Textron Aviation Inc.; names 13 of 18 models: 150L, 150B, 150D, 150E, 150M, 150K, 150C, 150G… - [TCDS 3A17](https://openairdocs.org/tcds/3A17): Textron Aviation Inc.; names 5 of 12 models: 172RG, 175, 175B, 175C, 175A ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 41,427 (41,427 by airframe model, 0 by engine model) - Makers: Cessna 39,834, Textron 1,586, P Z L Koliber 4, Cessna Wren 3 Models with the most aircraft: - [Cessna 172M](https://openairdocs.org/model/cessna-172m): 3,573 aircraft (airframe model) - [Cessna 172N](https://openairdocs.org/model/cessna-172n): 3,138 aircraft (airframe model) - [Cessna 182P](https://openairdocs.org/model/cessna-182p): 2,099 aircraft (airframe model) - [Cessna 172S](https://openairdocs.org/model/cessna-172s): 1,915 aircraft (airframe model) - [Cessna 172](https://openairdocs.org/model/cessna-172): 1,805 aircraft (airframe model) - [Cessna 182Q](https://openairdocs.org/model/cessna-182q): 1,565 aircraft (airframe model) - [Cessna 150L](https://openairdocs.org/model/cessna-150l): 1,447 aircraft (airframe model) - [Cessna 150M](https://openairdocs.org/model/cessna-150m): 1,439 aircraft (airframe model) - [Textron 172S](https://openairdocs.org/model/textron-172s): 1,239 aircraft (airframe model) - [Cessna 172P](https://openairdocs.org/model/cessna-172p): 1,111 aircraft (airframe model) - [Cessna 150F](https://openairdocs.org/model/cessna-150f): 1,063 aircraft (airframe model) - [Cessna 172K](https://openairdocs.org/model/cessna-172k): 1,026 aircraft (airframe model) - [Cessna 150G](https://openairdocs.org/model/cessna-150g): 977 aircraft (airframe model) - [Cessna 182T](https://openairdocs.org/model/cessna-182t): 969 aircraft (airframe model) - [Cessna 172L](https://openairdocs.org/model/cessna-172l): 857 aircraft (airframe model) - [Cessna 182A](https://openairdocs.org/model/cessna-182a): 784 aircraft (airframe model) - [Cessna 172H](https://openairdocs.org/model/cessna-172h): 780 aircraft (airframe model) - [Cessna 150H](https://openairdocs.org/model/cessna-150h): 756 aircraft (airframe model) - [Cessna 172G](https://openairdocs.org/model/cessna-172g): 722 aircraft (airframe model) - [Cessna 172F](https://openairdocs.org/model/cessna-172f): 717 aircraft (airframe model) All 63 models: https://openairdocs.org/ad/71-22-02/models.md Every aircraft: https://openairdocs.org/ad/71-22-02/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.