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 |
|---|---|---|---|---|
| 48-27-03 | Lockheed Aircraft Corporation 649-79, 749-79 | Propeller Hub Peening | Propeller | |
| 48-27-01 | Lockheed Aircraft Corporation 149-46, 49-46 | Fuel Dump Standpipes | Other and general | |
| 48-26-01 | Lockheed Aircraft Corporation 649-79, 749-79 | Engine Speed Restrictions-Curtiss Prop | Engine | |
| 48-25-03 | Cessna Aircraft Company 120, 140 | Wing Drag Wire System | Electrical power | |
| 48-25-02 | Cessna Aircraft Company 120, 140 | Welded Exhaust Muffler | Engine | |
| 48-25-01 | The Boeing Company C54-DC, DC-4 | Fire Warning System | Emergency equipment | |
| 48-24-01 | Martin-Marietta Corporation 202 | Rudder Hinge Brackets | Flight controls | |
| 48-22-01 | Pratt & Whitney Division Double Wasp CA15, Double Wasp CA17, Double Wasp CA18,... and 7 more | Water-Alcohol Injection System | Engine | |
| 48-21-01 | Wytwornia Sprzetu Komunikacyjnego 6A4-150-B3, 6A4-150-B31 | Accelerator Pump Linkage | Engine | |
| 48-19-03 | The Boeing Company DC-6, DC-6A, DC-6B | Elevator Trim Tab Operating Mechanism | Flight controls | |
| 48-19-02 | Lockheed Aircraft Corporation 149-46, 49-46, 649-79, 749-79 | Elevator Lever | Flight controls | |
| 48-19-01 | Scotts-Bell 47 Inc 47B, 47B3, 47D | Damper Support Frames | Other and general | |
| 48-18-04 | Lockheed Aircraft Corporation 49-46 | Supercharger Bearing Thermocouple | Other and general | |
| 48-18-03 | Lockheed Aircraft Corporation 49-46 | Cabin Supercharger Driveshaft | Cabin, seats and restraints | |
| 48-18-02 | Sikorsky Aircraft Corporation S-51 | Bevel Drive Gear Splines | Other and general | |
| 48-17-04 | The Boeing Company C54-DC, C54A-DC, C54B-DC, C54D-DC and 3 more | Vacuum Pumps | Heating, ice protection and utility systems | |
| 48-17-03 | Sikorsky Aircraft Corporation S-51 | Planet Pinion Shafts Wear | Other and general | |
| 48-17-02 | Martin-Marietta Corporation 202 | Cargo Compartment Insulation | Other and general | |
| 48-17-01 | The Boeing Company DC3-G102, DC3-G102A, DC3-G103A, DC3-G202A and 10 more | Fire Prevention Modifications | Other and general | |
| 48-15-03 | The Boeing Company C54-DC, C54A-DC, C54B-DC, C54D-DC and 3 more | Hydraulic Pressure Regulator Rework | Heating, ice protection and utility systems | |
| 48-15-02 | Martin-Marietta Corporation 202 | Oil Tank Vent Hose | Other and general | |
| 48-15-01 | Martin-Marietta Corporation 202 | Automatic Pilot Cable | Other and general | |
| 48-14-04 | The Boeing Company C54-DC, C54A-DC, C54B-DC, C54D-DC and 1 more | Tailpipe Shroud Deflector | Other and general | |
| 48-14-03 | Textron Aviation Inc. Army AT-11, C18S | Wing Center Section Spar | Airframe structure | |
| 48-14-01 | FS 2003 Corp. PA-12 | Fuel Line Elbow | Fuel system | |
| 48-13-07 | American Champion Aircraft Corp. 11AC, S11AC | Turnbuckle Fork Replacement | Other and general | |
| 48-13-06 | Bellanca Aircraft Corporation 14-13, 14-13-2 | Engine Cowl Brackets | Engine | |
| 48-13-04 | FS 2003 Corp. PA-12 | Fuse-Clip Attachment | Other and general | |
| 48-13-03 | FS 2003 Corp. PA-12 | Battery Hold Down Brackets | Electrical power | |
| 48-13-02 | Scotts-Bell 47 Inc 47, 47B, 47B3, 47D and 20 more | Fuel Pump Rocker Pin | Fuel system | |
| 48-13-01 | Textron Aviation Inc. D18C, D18S | Generator Control Box Insulation | Electrical power | |
| 48-12-05 | Scotts-Bell 47 Inc 47B, 47B3, 47D | Shear Screw Replacement | Other and general | |
| 48-12-04 | Lockheed Aircraft Corporation 149-46, 49-46 | Fire Prevention Requirements | Other and general | |
| 48-12-03 | Lockheed Aircraft Corporation 649-79, 749-79 | Smoke Detector System | Emergency equipment | |
| 48-12-02 | The Boeing Company C54-DC, C54A-DC, C54B-DC, C54D-DC and 3 more | Nose And Cabin Heater Rework | Cabin, seats and restraints | |
| 48-12-01 | The Boeing Company C54-DC, C54A-DC, C54B-DC, C54D-DC and 3 more | Fire Prevention Requirements | Other and general | |
| 48-11-05 | Scotts-Bell 47 Inc 47B, 47B3 | Rotor Drag Brace | Other and general | |
| 48-11-04 | Sky Enterprises, Inc. RC-3 | Hydraulic Pump Handle | Heating, ice protection and utility systems | |
| 48-11-02 | The Boeing Company DC-6, DC-6A, DC-6B | Cabin Supercharger | Cabin, seats and restraints | |
| 48-11-01 | The Boeing Company DC-6, DC-6A, DC-6B | Ungrounding Modification - Class B | Other and general | |
| 48-10-02 | Scotts-Bell 47 Inc 47B, 47B3, 47D | Rotor Blade Rework | Rotorcraft systems | |
| 48-10-01 | The Boeing Company DC-6, DC-6A, DC-6B | Ungrounding Modification - Class A | Other and general | |
| 48-09-03 | Don Luscombe Aviation History Foundation, Inc. 8, 8A, 8B, 8C and 4 more | Kollsman Airspeed Baffle | Instruments and avionics | |
| 48-09-02 | The Boeing Company C54-DC, C54A-DC, C54B-DC, C54D-DC and 3 more | Electrical Distribution Bus | Electrical power | |
| 48-09-01 | The Boeing Company C54-DC, C54A-DC, C54B-DC, C54D-DC and 3 more | Fuel Transfer Placard | Other and general | |
| 48-08-03 | Sierra Hotel Aero, Inc. Navion (Army L-17A) | Fuel Valve Control Support Clip | Engine | |
| 48-08-02 | American Champion Aircraft Corp., Don Luscombe Aviation... 11AC, 11BC, 11CC, 7AC and 32 more | Cleveland Wheels | Landing gear | |
| 48-08-01 | Textron Aviation Inc. 35, 35-33, 35-A33, 35-B33 and 3 more | Starter Rework | Engine | |
| 48-07-03 | The Boeing Company DC-6, DC-6A, DC-6B | Door Rework | Airframe structure | |
| 48-07-02 | The Boeing Company DC-6, DC-6A, DC-6B | Engine Supercharger Control Actuator | Engine |
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.