What the FAA has ordered
An airworthiness directive is an order: when the FAA finds an unsafe condition in a design, it tells the owners of every aircraft, engine or propeller of that design what to inspect, repair or replace, and by when. 20,214 are on file, 291 of them issued as emergencies, 306 so far this year. Each one here is linked to the model families and engine series it names, with the number of aircraft on the register today.
8 orders on airframe structure on the Piper PA-23 Apache and Aztec family newest first
The list behind a number on the Piper PA-23 Apache and Aztec page. Every order.
| Order | In force | Applies to | What it is about | System |
|---|---|---|---|---|
| 2021-25-11 | 2022-01-25 | Piper Aircraft Inc. PA-23-250 | Horizontal Stabilizer Structure | Airframe structure |
| 2009-13-06 R1 | 2011-11-03 | Piper Aircraft Inc. PA-23, PA-23-160, PA-23-235, PA-23-250 and 15 more | Doors | Airframe structure |
| 2009-13-06 | 2009-07-24 | Piper Aircraft Inc. PA-23, PA-23-160, PA-23-235, PA-23-250 and 15 more | Nose baggage door | Airframe structure |
| 98-21-21 R1 | 2000-05-01 | Cessna Aircraft Company, Emerald Enterprises Ltd. 17-30, 17-30A, 17-31, 17-31A and 266 more | Electric Inflatable Door Seals | Airframe structure |
| 99-05-09 | 1999-03-19 | Piper Aircraft Inc. PA-23-235, PA-23-250, PA-23-250 (Navy UO-1), PA-24-250 and 19 more | Induction Air Filter | Airframe structure |
| 79-26-01 | 1979-12-24 | Piper Aircraft Inc. PA-23-250, PA-23-250 (Navy UO-1) | Stabilator Skins and Frame | Airframe structure |
| 63-26-03 | 1971-07-13 | Piper Aircraft Inc. PA-23, PA-23-160 | Tail Area Inspection | Airframe structure |
| 55-21-02 | 1956-12-04 | Piper Aircraft Inc. PA-23 | Front Wing Spar Attachment Fitting | Airframe structure |
Source: FAA airworthiness directives (final rules and emergency directives) from the FAA's Dynamic Regulatory System, as of November 2, 2026. The FAA's text is the authority; this site adds the links to models, engines and the register. Related: aircraft systems · type certificates.