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. 20,193 are on file, 291 of them issued as emergencies, 285 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.
6 orders on engine on the Cessna 150 family newest first
The list behind a number on the Cessna 150 page. Every order.
| Order | In force | Applies to | What it is about | System |
|---|---|---|---|---|
| 96-12-22 | 1996-07-31 | Bellanca Aircraft Corporation, Cessna Aircraft Company CH-300 Pacemaker, 120, 140, 140A and 360 more | Full Flow Engine Oil Adapter | Engine |
| 86-24-07 | 1987-01-07 | Cessna Aircraft Company 150C, 150D, 150E, 150F and 141 more | Engine Controls Installation | Engine |
| 86-15-07 | 1986-07-24 | Cessna Aircraft Company 150, 150A, 150B, 150C | Modification - Larger Engine | Engine |
| 81-15-03 | 1981-07-20 | Cessna Aircraft Company, Mooney Aviation Company Inc 2150A, 120, 140, 140A and 115 more | Engine Inlet Air Filters | Engine |
| 75-15-08 | 1975-09-10 | Cessna Aircraft Company, Textron Aviation Inc. 150, 150A, 150B, 150C and 28 more | Engine Lubrication | Engine |
| 67-03-01 | 1967-01-14 | Cessna Aircraft Company 150, 150A, 150B, 150C and 9 more | Exhaust Gas Heat Exchangers | Engine |
Source: FAA airworthiness directives (final rules and emergency directives) from the FAA's Dynamic Regulatory System, as of October 9, 2026. The FAA's text is the authority; this site adds the links to models, engines and the register. Related: aircraft systems · type certificates.