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 instruments and avionics on the Learjet 35 family newest first
The list behind a number on the Learjet 35 page. Every order.
| Order | In force | Applies to | What it is about | System |
|---|---|---|---|---|
| 2006-16-18 R1 | 2008-07-18 | Airbus, The Boeing Company A300 B2-1A, A300 B2-1C, A300 B2-203, A300 B2K-3C and 99 more | Installing a warning placard on the TAWS/RMI | Instruments and avionics |
| 97-05-03 R1 | 1999-04-20 | BAE Systems (Operations) Limited, Cessna Aircraft Company Avro 146-RJ100A, BAe 146-200A, Jetstream Model 4101, 525 and 26 more | Global Positioning Systems | Instruments and avionics |
| 82-01-05 R2 | 1986-04-10 | Learjet Inc. 23, 24, 24A, 24B and 15 more | Stall Warning Accelerometer Unit | Instruments and avionics |
| 80-17-11 | 1980-08-28 | Learjet Inc. 35, 35A (C-21A), 36, 36A | Airspeed Warning Placard | Instruments and avionics |
Source: FAA airworthiness directives (final rules and emergency directives) from the FAA's Dynamic Regulatory System, as of October 27, 2026. The FAA's text is the authority; this site adds the links to models, engines and the register. Related: aircraft systems · type certificates.