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 |
|---|---|---|---|---|
| 57-12-02 | Scotts-Bell 47 Inc 47H-1 | Tail Boom Attach Fittings | Rotorcraft systems | |
| 57-12-01 | Scotts-Bell 47 Inc 47H-1 | Elevator Control Alinement | Flight controls | |
| 57-11-01 | Airlift International, Inc., Curtiss-Wright Corporation C-46A, C-46D, C-46F, C-46R and 11 more | Elevator Spring Tab Cartridge Assemblies | Flight controls | |
| 57-10-01 | Mooney Aviation Company Inc M20 | Landing Gear Bellcrank Bracket | Landing gear | |
| 57-09-01 | Twin Commander Aircraft LLC 520, 560, 560-A, 680 | Aileron Bellcrank Casting | Flight controls | |
| 57-08-07 | Curtiss-Wright/Marquette, Inc. Double Row Turbo Cyclone 972TC18DA1 (R-3350-34, -91),... and 7 more | Impeller Drive Gear Assemblies | Engine | |
| 57-08-06 | Vickers-Armstrongs (Aircraft Limited) Viscount 744, Viscount 745D | Horizontal Stabilizer | Airframe structure | |
| 57-08-04 | Hartzell Propeller, Inc. HC-83X20-1, HC-83X20-2, HC-83XF-1, HC-83XF-2 and 7 more | Link Arm | Propeller | |
| 57-08-02 | Scotts-Bell 47 Inc 47B3, 47D, 47D1, 47G and 1 more | Parker Check Valve | Engine | |
| 57-08-01 | Scotts-Bell 47 Inc 47, 47B, 47B3, 47D and 20 more | Tail Rotor Drive Shafts | Rotorcraft systems | |
| 57-07-02 | Scotts-Bell 47 Inc 47, 47B, 47B3, 47D and 20 more | Rotor Hub Equalizer Link | Rotorcraft systems | |
| 57-07-01 | Scotts-Bell 47 Inc 47H-1 | Elevator Inspection and Rework | Flight controls | |
| 57-06-04 | Curtiss-Wright/Marquette, Inc. Double Row Cyclone 956C18CA1, Double Row Cyclone... and 9 more | Engine Front Section | Engine | |
| 57-06-03 | Pratt & Whitney Division Wasp Major B13, Wasp Major B14, Wasp Major B5, Wasp Major B6 and 3 more | Propeller Shaft Oil Transfer Bearing | Engine | |
| 57-06-02 | Martin-Marietta Corporation 202, 202A, 404 | Engine Mount Stud | Engine | |
| 57-06-01 | Revo, Incorporated Colonial C-1 | Landing Gear Lock | Landing gear | |
| 57-05-04 | Pratt & Whitney Division Military R-985 Series, Wasp Jr. A, Wasp Jr. B-4, Wasp Jr. B-5 and 9 more | Crankshaft | Engine | |
| 57-05-01 | Airlift International, Inc., Curtiss-Wright Corporation C-46A, C-46D, C-46F, C-46R and 11 more | Hydraulic Vent System | Heating, ice protection and utility systems | |
| 57-04-01 | Cessna Aircraft Company 310, 310A, 310B, 310C and 14 more | Aileron Hinge | Flight controls | |
| 57-03-04 | Martin-Marietta Corporation 202, 202A, 404 | Zone Iii Fire Protection | Other and general | |
| 57-03-03 | The Boeing Company, Lockheed Aircraft Corporation DC-7, DC-7B, DC-7C, 1049-54 and 15 more | Micronic Filter Cover | Other and general | |
| 57-03-02 | The Boeing Company, Lockheed Aircraft Corporation DC-7, DC-7B, DC-7C, 1049-54 and 14 more | Fuel Strainer Screen | Other and general | |
| 57-03-01 | Kelowna Flightcraft R & D Ltd. 240 Series | Main Outboard Landing Gear Fitting | Landing gear | |
| 56-27-04 | Sierra Hotel Aero, Inc. Navion B | Engine Cooling Kit Removal | Engine | |
| 56-27-02 | Hiller Aviation UH-12, UH-12A, UH-12B | Engine Mount Welds | Engine | |
| 56-27-01 | Kelowna Flightcraft R & D Ltd. 340, 440 | Elevator Servo Tab Rod | Flight controls | |
| 56-26-04 | Vickers-Armstrongs (Aircraft Limited) Viscount 745D | Nacelle Side Brackets | Airframe structure | |
| 56-26-01 | Lockheed Aircraft Corporation 1049-54, 1049B-55 (Navy R7V-1), 1049C-55, 1049D-55 and 4 more | Main Relay Box Rework | Electrical power | |
| 56-25-04 | Lockheed Aircraft Corporation 1049-54, 1049C-55, 149-46, 49-46 and 4 more | Flap Symmetry | Flight controls | |
| 56-25-02 | Scotts-Bell 47 Inc 47, 47B, 47B3, 47D and 20 more | Tail Rotor Pitch Bearings | Rotorcraft systems | |
| 56-24-02 | Kelowna Flightcraft R & D Ltd., Martin-Marietta Corporation 240 Series, 340, 440, 202A and 1 more | Carburetors | Other and general | |
| 56-24-01 | Kelowna Flightcraft R & D Ltd. 240 Series, 340, 440 | Cylinder | Engine | |
| 56-23-03 | Orlando Helicopter Airways, Inc., Sikorsky Aircraft Corporation HRS-1/CH-19, HRS-3/H-19B, S-55, S-55B and 1 more | Horizontal Hinge Pin Assembly | Other and general | |
| 56-22-02 | Helio Aircraft LLC H-391B | Wing Attachment Washers | Airframe structure | |
| 56-22-01 | Hamilton Standard Propeller Blades | Rubber Accessories | Propeller | |
| 56-21-04 | Russell Manufacturing Company Safety Belts | Safety Belts | Other and general | |
| 56-21-02 | Cessna Aircraft Company T-50 | Spar Deterioration | Airframe structure | |
| 56-21-01 | Scotts-Bell 47 Inc 47G, 47G-2, 47H-1 | Hydraulic Boost Cylinders | Heating, ice protection and utility systems | |
| 56-20-06 | Curtiss-Wright/Marquette, Inc., Hamilton Standard Double Row Turbo Cyclone 972TC18DA1 (R-3350-34, -91),... and 8 more | Gear Shafts | Engine | |
| 56-20-05 | The Boeing Company C54-DC, DC-4, DC3-G102, DC3-G102A and 2 more | Propeller Operating Limits | Propeller | |
| 56-20-04 | Kelowna Flightcraft R & D Ltd. 240 Series, 340, 440 | Fire Seals | Other and general | |
| 56-20-03 | Scotts-Bell 47 Inc 47B, 47B3, 47D, 47D1 and 3 more | Tail Rotor Hub Bolts | Rotorcraft systems | |
| 56-20-01 | Textron Aviation Inc. E18S | Tailwheel Axle | Landing gear | |
| 56-19-02 | Hamilton Standard Propeller Blades | Blade | Propeller | |
| 56-19-01 | de Havilland Aircraft Co., Ltd., The D.H. 104 Dove Series 1A, D.H. 104 Dove Series 2A, D.H.... and 6 more | Aileron Pulley Locking Pin | Flight controls | |
| 56-18-03 | P. V. Shields A-26B (Army), A-26C (Army) | Nose Wheel Cross Beam Assembly | Landing gear | |
| 56-18-02 | Kelowna Flightcraft R & D Ltd. 340 | Crankcase | Other and general | |
| 56-18-01 | Kelowna Flightcraft R & D Ltd. 240 Series | Generator | Electrical power | |
| 56-17-03 | Hartzell Propeller, Inc. HC-12X20-1, HC-12X20-2, HC-12X20-3, HC-12X20-4 and 5 more | Valve Tube | Engine | |
| 56-17-02 | Viking Air Limited DHC-3 | Flap Control Restriction | Flight controls |
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.