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. 20,206 are on file, 291 of them issued as emergencies, 298 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.
4 orders on engine on the Cessna 501 Citation I/SP family newest first
The list behind a number on the Cessna 501 Citation I/SP page. Every order.
| Order | In force | Applies to | What it is about | System |
|---|---|---|---|---|
| 2015-17-12 | 2015-09-29 | Cessna Aircraft Company, Textron Aviation Inc. 501, 551, 500, 550 and 3 more | Air conditioning | Engine |
| 2013-09-11 | 2013-07-05 | Cessna Aircraft Company 500, 501, 550, 551 and 4 more | Air Conditioning | Engine |
| 2007-11-17 | 2007-07-06 | Cessna Aircraft Company 500, 501, 550, 551 and 4 more | Wires for the positive and negative terminal studs of the engine and/or auxiliary power unit (APU) fire... | Engine |
| 2004-09-05 | 2004-06-02 | Cessna Aircraft Company 500, 501, 550, 551 | Brake Stator Disks | Engine |
Source: FAA airworthiness directives (final rules and emergency directives) from the FAA's Dynamic Regulatory System, as of October 26, 2026. The FAA's text is the authority; this site adds the links to models, engines and the register. Related: aircraft systems · type certificates.