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.
20,218 orders newest first
| Order | In force | Applies to | What it is about | System |
|---|---|---|---|---|
| 52-13-01 | Collins Radio Receivers | Radio Receivers | Instruments and avionics | |
| 52-12-03 | Lockheed Aircraft Corporation 149-46, 49-46, 649-79, 649A-79 and 2 more | Bulkhead Ring and Bracket | Airframe structure | |
| 52-12-02 | Airlift International, Inc., Curtiss-Wright Corporation C-46A, C-46D, C-46F, C-46R and 11 more | Passenger Cabin Door | Cabin, seats and restraints | |
| 52-11-02 | Kelowna Flightcraft R & D Ltd. 240 Series | Nacelle | Airframe structure | |
| 52-11-01 | Kearns, Edward Scott Trojan A-2 | Elevator Tube Socket | Flight controls | |
| 52-10-01 | Airlift International, Inc., Curtiss-Wright Corporation C-46A, C-46D, C-46F, C-46R and 11 more | Electric Power System | Other and general | |
| 52-08-02 | Sierra Hotel Aero, Inc. Navion B | Carburetor Ducting | Engine | |
| 52-08-01 | Lockheed Aircraft Corporation 18 | Fuel Tank Seal | Fuel system | |
| 52-07-01 | Scotts-Bell 47 Inc 47D1 | Loading Chart Decal | Other and general | |
| 52-05-03 | Scotts-Bell 47 Inc 47, 47B, 47B3, 47D and 20 more | Engine Mount Safety Strap | Engine | |
| 52-05-02 | Martin-Marietta Corporation 202, 202A | Center Wing Spar Rework | Airframe structure | |
| 52-04-08 | Martin-Marietta Corporation 202, 202A | Anti-Icing Heater Controls | Heating, ice protection and utility systems | |
| 52-04-07 | Martin-Marietta Corporation 202, 202A | Heater Control Modification | Heating, ice protection and utility systems | |
| 52-04-06 | Martin-Marietta Corporation 202, 202A | Cabin Heater Lights And Switch | Cabin, seats and restraints | |
| 52-04-05 | Martin-Marietta Corporation 202, 202A | Oil Quantity Indicator | Instruments and avionics | |
| 52-04-04 | Martin-Marietta Corporation 202, 202A | Lighting Circuit Protection | Electrical power | |
| 52-04-03 | Martin-Marietta Corporation 202, 202A | Pressure Gage | Other and general | |
| 52-04-02 | Martin-Marietta Corporation 202, 202A | Inverter Control Protection | Electric propulsion | |
| 52-04-01 | Martin-Marietta Corporation 202 | Fuel Line Vent | Fuel system | |
| 52-03-01 | Fairchild Engine Division, Fairchild Engine and Airplane Corp. 6-440-C2 (L-440-1), 6-440-C3, 6-440-C4, 6-440-C5... | Pistons | Engine | |
| 52-02-03 | Martin-Marietta Corporation 202, 202A | Oxygen Bottle Relocation | Emergency equipment | |
| 52-02-02 | Univair Aircraft Corporation 415-C, 415-CD, 415-D, E and 1 more | Aileron Balance Assembly | Flight controls | |
| 52-02-01 | Consolidated Vultee Aircraft Corporation, Stinson Division BT-13, BT-13A (Army SNV-1), BT-13B (Navy SNV-2), BT-15 | Bronze Rear Spar Fittings | Airframe structure | |
| 52-01-08 | Hiller Aviation UH-12, UH-12A, UH-12B | Collective Pitch Incidence Arms | Other and general | |
| 52-01-07 | Scotts-Bell 47 Inc 47D1 | Engine Cooling Fan | Engine | |
| 52-01-06 | Scotts-Bell 47 Inc 47, 47B, 47B3, 47D and 20 more | Tail Boom Spoiler | Rotorcraft systems | |
| 52-01-05 | Scotts-Bell 47 Inc 47B, 47B3, 47D | Rotor Blade Grip Retaining Bolt | Rotorcraft systems | |
| 52-01-03 | Scotts-Bell 47 Inc 47B, 47B3, 47D | Damper Lever and Link | Other and general | |
| 52-01-02 | Scotts-Bell 47 Inc 47B, 47B3, 47D | Horns and Drag Brace Fittings | Other and general | |
| 52-01-01 | Scotts-Bell 47 Inc 47B, 47B3, 47D, 47D1 | Blade Grip Adapter Locks | Other and general | |
| 51-29-02 | Airlift International, Inc., Curtiss-Wright Corporation C-46A, C-46D, C-46F, C-46R and 11 more | Main Landing Gear | Landing gear | |
| 51-29-01 | Scotts-Bell 47 Inc 47B, 47B3, 47D, 47D1 | Tail Rotor Gearbox Shaft | Rotorcraft systems | |
| 51-28-03 | Ryan Aeronautical Company ST-3KR | Fuel Valve Placard | Engine | |
| 51-28-02 | Wytwornia Sprzetu Komunikacyjnego 6V4-178-B3, 6V4-178-B31, 6V4-178-B32, 6V4-178-B33 and 2 more | Oil Pump Gears | Engine | |
| 51-28-01 | Kelowna Flightcraft R & D Ltd. 240 Series | Engine Accessory Section | Engine | |
| 51-27-01 | Scotts-Bell 47 Inc 47, 47B, 47B3, 47D and 20 more | Engine Mount Replacement | Engine | |
| 51-26-03 | Continental Motors E185-1, E185-10, E185-11, E185-2 and 4 more | Valve Lifters | Engine | |
| 51-26-02 | Lear, Inc. Automatic Pilots | Automatic Pilots | Other and general | |
| 51-26-01 | Scotts-Bell 47 Inc 47B, 47B3, 47D, 47D1 | Tail Rotor Reinforcement | Rotorcraft systems | |
| 51-25-02 | Martin-Marietta Corporation 202, 202A | Circuit Breaker Cover | Electrical power | |
| 51-25-01 | Cessna Aircraft Company T-50 | Horizontal Stabilizer | Airframe structure | |
| 51-24-02 | Martin-Marietta Corporation 202 | Fin Inspection | Airframe structure | |
| 51-24-01 | Lycoming Engines GO-435-C2 (O-435-17) | Exhaust Valve Seats | Engine | |
| 51-23-04 | Sikorsky Aircraft Corporation S-51 | Rotor Link Assemblies | Other and general | |
| 51-22-01 | Sikorsky Aircraft Corporation S-51 | Gear Shaft Replacement | Other and general | |
| 51-21-03 | JGS Properties, LLC 11A | Rudder Bellcrank | Flight controls | |
| 51-21-02 | FS 2003 Corp. PA-12, PA-12S | Aileron Hinge Brackets | Flight controls | |
| 51-21-01 | Cessna Aircraft Company 120, 140, 140A | Rudder Rib Flanges | Flight controls | |
| 51-20-03 | Hiller Aviation UH-12, UH-12A | Collective Pitch Ballast System Bracket | Other and general | |
| 51-20-02 | Martin-Marietta Corporation 202, 202A | Modification Board Items | Other and general |
Source: FAA airworthiness directives (final rules and emergency directives) from the FAA's Dynamic Regulatory System, as of November 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.