# AD 73-23-07: Defective Spar Attachment Fittings - Type: Airworthiness directive - Status: Current - Products: Cessna 150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L and 59 more - Effective: November 19, 1973 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-1744 - Registered aircraft: 43,565 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/65A7037C7EEE708086256A340064678E.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/73-23-07 ## The airworthiness directive 73-23-07 CESSNA: Amdt. 39-1744. Applies to Model 150 (S/Ns 15074635 thru 15074799); Model A150 (S/Ns A1500415 thru 1500427); Model 172 (S/Ns 17261664 thru 17261808); Model 180 (S/Ns 18052335 thru 18052349); Model 182 (S/Ns 18261960 thru 18262105) and Model 185 (S/Ns 18502199 thru 18502238) airplanes. Compliance: Required as indicted, unless already accomplished. To prevent defective spar attachment fitting from remaining in service, within the next 50 hours' time in service after the effective date of this AD, replace P/N 0523306 wing attach fittings with Cessna Service Kit SK 150-45A, dated July 27, 1973, referred to in Cessna Service Letter SE73-20, dated August 17, 1973, or later FAA-approved revisions, or with any other airworthy part approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. This amendment becomes effective November 19, 1973. ## Affected data sheets (6) (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 16 of 18 models: 150L, 150B, 150D, A150L, A150K, 150E, A150M, 150M… - [TCDS 5A6](https://openairdocs.org/tcds/5A6): Textron Aviation Inc.; names 11 of 11 models: 180E, 180J, 180F, 180H, 180A, 180, 180B, 180D… - [TCDS 3A24](https://openairdocs.org/tcds/3A24): Textron Aviation Inc.; names 6 of 8 models: 185B, 185E, 185C, 185A, 185D, 185 - [TCDS 3A17](https://openairdocs.org/tcds/3A17): Textron Aviation Inc.; names 1 of 12 models: 172RG ## 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: 43,565 (43,565 by airframe model, 0 by engine model) - Makers: Cessna 41,972, 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): 1,914 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 180](https://openairdocs.org/model/cessna-180): 1,177 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): 968 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) All 79 models: https://openairdocs.org/ad/73-23-07/models.md Every aircraft: https://openairdocs.org/ad/73-23-07/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.