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. 20,218 are on file, 291 of them issued as emergencies, 310 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 engine on the Cessna 177 Cardinal family newest first
The list behind a number on the Cessna 177 Cardinal page. Every order.
| Order | In force | Applies to | What it is about | System |
|---|---|---|---|---|
| 2008-26-10 | 2009-01-05 | Cessna Aircraft Company 172, 172A, 172B, 172C and 178 more | Alternate static air source selector valve | Engine |
| 99-27-02 | 2000-01-21 | Cessna Aircraft Company 170B, 172, 172A, 172B and 35 more | Fuel Selector Valves | Engine |
| 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 |
| 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 |
| 76-21-06 | 1976-10-26 | Cessna Aircraft Company 172M, 172N, 177B, 177RG | Loss of Engine Oil | Engine |
| 71-24-04 | 1971-11-23 | Cessna Aircraft Company 177, 206, 210D, 210E and 27 more | Flexible Hoses In Engine Compartment | Engine |
| 70-24-04 | 1970-12-08 | Cessna Aircraft Company 177, 177A, 177B | Fuel Shut-Off Valve | Engine |
Source: FAA airworthiness directives (final rules and emergency directives) from the FAA's Dynamic Regulatory System, as of November 7, 2026. The FAA's text is the authority; this site adds the links to models, engines and the register. Related: aircraft systems · type certificates.