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. 20,214 are on file, 291 of them issued as emergencies, 306 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.
322 orders on engine of the 1970s newest first
| Order | In force | Applies to | What it is about | System |
|---|---|---|---|---|
| 79-26-03 | 1979-12-26 | Bendix Energy Controls Division Fuel Injection Units | Fuel Injector Systems | Engine |
| 79-25-03 | 1979-12-13 | Rolls-Royce Corporation 501-D13, 501-D13A, 501-D13D, 501-D13E and 1 more | Second, Third, And Fourth Stage Turbine Wheels | Engine |
| 79-22-05 | 1979-12-06 | Lockheed Martin Corporation L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, L-1011-385-3 | Forward and Aft Outflow Valve Gates | Engine |
| 79-22-01 | 1979-10-29 | American Champion Aircraft Corp. 7ECA, 8GCBC, 8KCAB | Exhaust System | Engine |
| 78-14-08 | 1979-10-24 | Rolls-Royce Corporation 250-C18, 250-C18A, 250-C18B, 250-C18C and 2 more | Fuel Pump Drive Spline | Engine |
| 79-18-12 | 1979-10-08 | Airbus SAS, Airesearch BAC 1-11 200 Series, BAC 1-11 400 Series, Manufacturing... and 45 more | Auxiliary Power Units | Engine |
| 79-19-12 | 1979-10-01 | Cessna Aircraft Company 441 | Engine Stoppage | Engine |
| 79-20-03 | 1979-09-26 | Honeywell International Inc. LTP 101-600, LTP 101-600A, LTP 101-600A-1A, LTS101-600A and 4 more | Fuel Control, Fuel Pump And Oil Pump Drive Gears | Engine |
| 79-04-05 | 1979-09-26 | Lycoming Engines, Textron Lycoming, AVCO Corporation AEIO-320-D1B, AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A and 214 more | Regulator Diaphragm Stem Assembly | Engine |
| 79-18-13 | 1979-09-06 | Rolls-Royce Corporation 250-C28B, 250-C28C | Third Stage Turbine Wheel | Engine |
| 79-18-09 | 1979-08-29 | Lockheed Martin Corporation L-1011-385-1, L-1011-385-1-14, L-1011-385-1-15, L-1011-385-3 | Engine Generator Feeder Cables | Engine |
| 79-18-08 | 1979-08-29 | The Boeing Company DC-10-10, DC-10-10F, DC-10-40 | Aft Engine Mount Barrel Nuts | Engine |
| 79-17-05 | 1979-08-22 | Piper Aircraft Inc. PA-38-112 | Fuel Gauges and Engine Instruments | Engine |
| 79-15-02 | 1979-07-20 | Lycoming Engines LO-360-A1G6D, O-360-A1G6D | Channel Plug In Carburetor | Engine |
| 79-13-06 | 1979-07-11 | Dornier Luftfahrt GmbH Do 28 D | Engine Fire System | Engine |
| 78-16-08 | 1979-06-25 | Piper Aircraft Inc. PA-32R-300, PA-32RT-300 | Loss of Engine Oil | Engine |
| 79-12-09 | 1979-06-19 | Piper Aircraft Inc. PA-36-285 | Engine Mount Attach Brackets | Engine |
| 79-12-07 | 1979-06-19 | Bendix, Lycoming Engines Magnetos, TIO-540-F2BD, TIO-540-N2BD, TIO-540-R2AD and 2 more | Magnetos | Engine |
| 74-22-01 | 1979-06-12 | The Boeing Company DC-9-11, DC-9-12, DC-9-13, DC-9-14 and 13 more | Engine Mounts | Engine |
| 79-11-03 | 1979-05-31 | Pratt & Whitney Canada Corp., Pratt & Whitney Canada Corp. PT6T-3, PT6T-6 | Automatic Fuel Control | Engine |
| 79-08-05 | 1979-05-24 | Aerostar Aircraft Corporation PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601),... | Engine Nacelles | Engine |
| 79-12-04 | 1979-05-10 | Honeywell International Inc. TPE331-10 | Forged Third Stage Turbine Wheel Blade | Engine |
| 79-09-04 | 1979-05-07 | Textron Aviation Inc. 76 | Engine Starter Relay Failures | Engine |
| 78-05-02 | 1979-04-05 | Honeywell International Inc. TPE331-1, TPE331-1U, TPE331-1UA, TPE331-2 and 10 more | Propeller Pitch Control Cam Follower Pin | Engine |
| 79-06-05 | 1979-03-26 | Rolls-Royce Corporation 250-C28B, 250-C30 | Overspeed Control System | Engine |
| 79-05-11 | 1979-03-15 | Piper Aircraft Inc. PA-44-180 | Engine Power Control Loss | Engine |
| 79-05-09 | 1979-03-12 | Teledyne Continental Motors 6-285-CA, GTSIO-520-C, GTSIO-520-D, GTSIO-520-H and 59 more | Oil Pump Assembly Or Oil Pressure Relief Valve Screw And/Or Plunger | Engine |
| 79-06-01 | 1979-02-23 | Revo, Incorporated Lake LA-4-200 | Engine Mounts with Cracked Straps | Engine |
| 78-12-09 | 1979-02-20 | Lycoming Engines O-320-H1AD, O-320-H1BD, O-320-H2AD, O-320-H2BD and 2 more | Crankshaft Gear Assembly | Engine |
| 77-07-07 | 1979-02-20 | Lycoming Engines O-320-H2AD | Oil Level Gage | Engine |
| 79-03-03 | 1979-02-12 | Cessna Aircraft Company T207A, T210M, TU206G | Engine Oil Pressure | Engine |
| 79-02-03 | 1979-01-29 | Grumman American Aviation Corporation G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B) | Engine Restart | Engine |
| 79-02-06 | 1979-01-25 | Cessna Aircraft Company 152, A152 | Exhaust System | Engine |
| 78-06-01 | 1979-01-24 | Continental Motors TSIO-520-J, TSIO-520-N | Cylinder Intake Tube | Engine |
| 78-23-12 | 1978-12-20 | Pratt & Whitney Division JT8D-1, JT8D-1A, JT8D-1B, JT8D-7 and 4 more | Third Stage Turbine Blade Rivet | Engine |
| 78-26-08 | 1978-12-19 | General Electric Company CT58-100-2, CT58-110-1, CT58-110-2, CT58-140-1 and 1 more | Lube Pump Drive Shaft | Engine |
| 78-25-01 | 1978-12-08 | Lycoming Engines O-235-L2C | Condensers | Engine |
| 78-22-08 | 1978-11-30 | Hiller Aviation, Siam Hiller Holdings, Inc. UH-12D, UH-12E | Flight/Engine Control | Engine |
| 78-22-10 | 1978-11-13 | Honeywell International Inc. TFE731-2, TFE731-3, TFE731-3R | Low Pressure Rotor Thrust Ball Bearings | Engine |
| 78-23-10 | 1978-11-07 | Lycoming Engines, Textron Lycoming, AVCO Corporation AEIO-320-D1B, AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A and 217 more | Center Body Bellows Seal Assembly | Engine |
| 78-23-08 | 1978-11-07 | Lycoming Engines IO-540-G1B5, IO-540-K1F5, IO-540-P1A5, IO-540-S1A5 | Fuel Pump To Fuel Injector Tube Elbow | Engine |
| 78-26-01 | 1978-11-03 | Rolls-Royce Corporation 250-C28B | Engine Electrical System | Engine |
| 76-06-09 | 1978-10-31 | Piper Aircraft, Inc. PA-31P | Engine Exhaust System | Engine |
| 78-19-01 | 1978-09-25 | Rolls-Royce plc RB211-22B-02, RB211-22B/MOD 72-8700 | High Pressure Turbine Discs | Engine |
| 78-16-05 | 1978-09-12 | Pratt & Whitney Division JT9D-20, JT9D-20J, JT9D-3A, JT9D-59A and 16 more | Sixth Stage Turbine Disks | Engine |
| 78-17-08 | 1978-09-01 | Pratt & Whitney Division JT9D-20, JT9D-3A, JT9D-7, JT9D-7A and 4 more | Fifteenth Stage Compressor Disks | Engine |
| 78-17-07 | 1978-08-31 | Pratt & Whitney Canada Corp. PT6A-38, PT6A-41, PT6A-45A | Fuel Control Unit | Engine |
| 78-17-06 | 1978-08-31 | Pratt & Whitney Canada Corp. JT15D-4 | Fuel Manifold Adapter Assemblies | Engine |
| 78-17-05 | 1978-08-31 | Pratt & Whitney Canada Corp., Pratt & Whitney Canada Corp. PT6T-3, PT6T-3A, PT6T-6 | Automatic Fuel Control Unit | Engine |
| 77-20-07 | 1978-08-31 | Lycoming Engines O-320-H1AD, O-320-H1BD, O-320-H2AD, O-320-H2BD and 2 more | Loose Rocker Arm Retaining Studs and Hydraulic Tappets | Engine |
Source: FAA airworthiness directives (final rules and emergency directives) from the FAA's Dynamic Regulatory System, as of October 31, 2026. The FAA's text is the authority; this site adds the links to models, engines and the register. Related: aircraft systems · type certificates.