73-23-07: Defective Spar Attachment Fittings
FAA order 73-23-07 is an airworthiness directive in force since November 19, 1973. The FAA's subject line: Defective Spar Attachment Fittings. It names Cessna 150, Cessna 172 Skyhawk, Cessna 180 Skywagon, Cessna 182 Skylane, Cessna 185 Skywagon, Cessna A150: about 43,558 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: airframe structure.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Cessna Aircraft Company
- Models
- 150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, 150M, 172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I, 172K, 172L, 172M, 172N, 172P, 172Q, 172R, 172RG, 172S, 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 180J, 180K, 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182K, 182L, 182M, 182N, 182P, 182Q, 182R, 182S, 182T, 185, 185A, 185B, 185C, 185D, 185E, A150K, A150L, A150M
- On this site
- Cessna 150 7,995 registered
Cessna 172 Skyhawk 20,670 registered
Cessna 180 Skywagon 2,606 registered
Cessna 182 Skylane 11,828 registered
Cessna 185 Skywagon 227 registered
Cessna A150 232 registered
Dates and paperwork
- In force since
- November 19, 1973
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (895 characters)
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.
Related safety bulletins advice on the same designs, not orders
2026-03-242026-08 · Floats
2025-12-222025-11 · RUDDER CONTROL SYSTEM
2025-07-282025-07 · Reciprocating Engine Supercharger
2022-12-06CE-19-01 R1 · Engine Oil and Airplane Hour Meter; Pressure Switch Failure
2021-08-26AIR-21-16 · FLIGHT COMPARTMENT EQUIPMENT, Cessna Seat Back Attachment Bolt Inspection
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 October 8, 2026. Connections as data: /graph/directive/73-23-07.json · aircraft systems.