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 |
|---|---|---|---|---|
| 55-09-04 | Hamilton Standard Division 242 | Hub | Propeller | |
| 55-09-03 | The Boeing Company DC-6, DC-6A, DC-6B | Circuit Breaker | Electrical power | |
| 55-09-02 | Airlift International, Inc., Curtiss-Wright Corporation C-46A, C-46D, C-46F, C-46R and 11 more | Terminal Assemblies | Other and general | |
| 55-08-01 | Beech Safety Belt Buckles | Safety Belt Buckles | Other and general | |
| 55-06-01 | American Navion Society, LTD., American Navion Society, LTD. D-16, D-16A | Fuselage Fuel Tank Enclosure | Fuel system | |
| 55-05-02 | Hamilton Standard Division 43E | Barrel Assembly | Propeller | |
| 55-05-01 | Scotts-Bell 47 Inc 47B, 47B3, 47D, 47D1 and 1 more | Pitch Control Link | Other and general | |
| 55-04-01 | Cessna Aircraft Company, Federal Skis 180, Wheel Skis | Wheel Skis | Landing gear | |
| 55-03-01 | Kelowna Flightcraft R & D Ltd. 340 | Elevator Servo Tab | Flight controls | |
| 55-02-02 | Lycoming Engines O-320-A1A, O-320-A2A | Gasket | Engine | |
| 55-01-01 | Sierra Hotel Aero, Inc. Navion (Army L-17A), Navion A (Army L-17B and L-17C), Navion B | Fuselage Frame Cracks | Airframe structure | |
| 54-26-01 | Gulfstream American Corporation G-44, G-44A | Landing Gear Valve Placard | Engine | |
| 54-25-02 | Curtiss-Wright/Marquette, Inc. Double Row Cyclone 975C18CB1, Double Row Turbo Cyclone... | Cam Drive Gear | Engine | |
| 54-24-04 | Martin-Marietta Corporation 202, 202A | Landing Gear Trunnion Fittings | Landing gear | |
| 54-24-03 | Lockheed Aircraft Corporation 1049-54, 1049B-55 (Navy R7V-1), 1049C-55, 1049D-55 and 7 more | Main Landing Gear Actuating Cylinder Assembly | Engine | |
| 54-24-02 | Lockheed Aircraft Corporation 1049C-55, 1049D-55, 1049E-55 | Wing Main Beam Web Inspection | Airframe structure | |
| 54-24-01 | Scotts-Bell 47 Inc 47B, 47B3, 47D, 47D1 and 2 more | Antitorque Pedal Stops | Other and general | |
| 54-22-01 | Lockheed Aircraft Corporation 1049-54, 1049B-55 (Navy R7V-1), 1049C-55, 1049D-55 and 6 more | Flexible Hose Replacement | Other and general | |
| 54-21-01 | AC Diaphragm Type Fuel Pumps | AC Diaphragm Type Fuel Pumps | Engine | |
| 54-20-02 | Orlando Helicopter Airways, Inc., Sikorsky Aircraft Corporation HRS-1/CH-19, HRS-3/H-19B, S-55, S-55B and 1 more | Support Assembly Cracks | Airframe structure | |
| 54-20-01 | Aircraft Belt & Trim Corporation Safety Belts | Safety Belts | Flight controls | |
| 54-19-02 | Orlando Helicopter Airways, Inc., Sikorsky Aircraft Corporation HRS-1/CH-19, HRS-3/H-19B, S-55, S-55B and 1 more | Servo Safety Clip | Flight controls | |
| 54-18-01 | Sierra Hotel Aero, Inc. Navion (Army L-17A), Navion A (Army L-17B and L-17C), Navion B | Wing-to-Fuselage Attachment | Airframe structure | |
| 54-16-01 | Orlando Helicopter Airways, Inc., Sikorsky Aircraft Corporation HRS-1/CH-19, HRS-3/H-19B, S-55, S-55B and 1 more | Main Transmission | Rotorcraft systems | |
| 54-15-01 | Viking Air Limited DHC-2 Mk.I, DHC-2 Mk.II, DHC-2 Mk.III | Control Cable Turnbuckle Threads | Flight controls | |
| 54-14-01 | Airlift International, Inc., Curtiss-Wright Corporation C-46A, C-46D, C-46F, C-46R and 11 more | Horizontal Stabilizer Rib | Airframe structure | |
| 54-13-01 | Orlando Helicopter Airways, Inc., Sikorsky Aircraft Corporation HRS-1/CH-19, HRS-3/H-19B, S-55, S-55B and 1 more | Star Assembly Bolt Replacement | Other and general | |
| 54-12-02 | McCauley Propeller Systems AAF 41D5926, D-1093 | Vibratory Stresses | Propeller | |
| 54-12-01 | Martin-Marietta Corporation 404 | Landing Gear Oleo Drag Struts | Landing gear | |
| 54-10-01 | Hamilton Standard Division 232, 242, 34D | Servo Piston Shaft | Propeller | |
| 54-09-01 | Fairchild Engine Division, Fairchild Engine and Airplane Corp. 6-440-C2 (L-440-1), 6-440-C3, 6-440-C4, 6-440-C5... | Carburetor Hotspot Heater Assembly | Engine | |
| 54-08-01 | Martin-Marietta Corporation 202, 202A, 404 | Nose Gear Piston And Work Assembly | Engine | |
| 54-06-02 | Martin-Marietta Corporation 202 | Wing Scarf Spice Bushing | Airframe structure | |
| 54-06-01 | The Boeing Company DC-6, DC-6A, DC-6B | Kiddie CO2 Discharge Valve | Engine | |
| 54-05-02 | Sensenich Propeller Manufacturing Company, Inc. 76AM6-2 | Blade Tip | Propeller | |
| 54-05-01 | Airlift International, Inc., Curtiss-Wright Corporation C-46A, C-46D, C-46F, C-46R and 11 more | CURTISS-WRIGHT Model C-46 Series Aircraft | Other and general | |
| 54-04-01 | AC Spark Plug LA-87 Spark Plugs | Spark Plugs | Engine | |
| 54-02-01 | Textron Lycoming, AVCO Corporation O-290-D2 | Magneto Timing | Engine | |
| 54-01-03 | Orlando Helicopter Airways, Inc., Sikorsky Aircraft Corporation HRS-1/CH-19, HRS-3/H-19B, S-55, S-55B and 1 more | Fuel Strainer Screen | Other and general | |
| 54-01-02 | Hamilton Standard Division 232, 242, 34D, 34E and 2 more | Stop Levers | Propeller | |
| 54-01-01 | Hamilton Standard Division 232, 242, 34D, 34E and 2 more | Solenoid Valves | Propeller | |
| 53-26-01 | Briggs & Stratton Corporation, Textron Aviation Inc. Ignition Switches, Army AT-11, C18S, D18C and 2 more | Ignition Switch | Engine | |
| 53-25-01 | The Boeing Company DC-6, DC-6A, DC-6B | Aileron Control System | Flight controls | |
| 53-24-03 | Mooney Mite Aircraft Corporation M-18L | Landing Gear Bellcrank | Landing gear | |
| 53-24-02 | Hiller Aviation UH-12, UH-12A, UH-12B | Tail Rotor Pitch Change Rod | Rotorcraft systems | |
| 53-23-03 | Sky Enterprises, Inc. RC-3 | Strut Fitting Corrosion | Landing gear | |
| 53-23-02 | Viking Air Limited DHC-2 Mk.I, DHC-2 Mk.II, DHC-2 Mk.III | Fuel Tank Filler Neck | Fuel system | |
| 53-23-01 | Kelowna Flightcraft R & D Ltd. 240 Series | Nose Landing Gear Clutch Plate | Landing gear | |
| 53-21-02 | Grumman American Aviation Corporation G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B) | Horizontal Stabilizer Strut | Landing gear | |
| 53-21-01 | Viking Air Limited DHC-2 Mk.I, DHC-2 Mk.II, DHC-2 Mk.III | Wing Rear Spar Attachment Bolt | Airframe structure |
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.