Airworthiness Directive · Amendment 39-14276 · Lycoming Engines (Formerly Textron Lycoming) AEIO-360, IO-360, O-360, LIO-360, LO-360, AEIO-540, IO-540, O-540, and TIO-540 Series Reciprocating Engines
Lycoming Engines (Formerly Textron Lycoming) AEIO-360, IO-360, O-360, LIO-360, LO-360, AEIO-540, IO-540, O-540, and TIO-540 Series Reciprocating Engines
This AD applies to Lycoming Engines (Formerly Textron Lycoming) AEIO-360, IO-360, O-360, LIO-360, LO-360, AEIO-540, IO-540, O-540, and TIO-540 series reciprocating engines, rated at 300 horsepower (HP) or lower, manufactured new, rebuilt, overhauled after March 1, 1999, or that had a crankshaft installed after March 1, 1999. These engines are installed on, but not limited to, the following aircraft:
| Engine model | Manufacturer | Aircraft model |
|---|---|---|
| IO-540-V4A5 | A.M.F | 17-D Mushshak |
| Aero Commander | 500 B, S, U/Merlyn Products Conv. | |
| IO-540-E1A5 | Aero Commander | 500-E |
| Aerofab | LA 250 Renegade | |
| Aeronautica | Agricola Mexicana Quail | |
| IO-540-K1F5 | Aerostar | 600 |
| Aircraft Manufacturing Factory | Mushshak | |
| O-540-E4A5 | Aviamilano | F-250 Flamingo |
| IO-540-C4B5 | Avions | Pierre Robin HR-100/250 |
| LO-360-A1G6D | Beech | 76 Duchess |
| O-360-A1G6D | 76 Duchess | |
| C-24R Sierra or 200 Sierra | ||
| Bellanca | Aircraft Aries T-250 | |
| O-540-E4B5 | Britten Norman | BN-2 Islander |
| O-540-E4C5 | BN-2A & BN-2B Islander | |
| IO-540-K1B5 | BN-2A Islander | |
| Celair | Eagle | |
| O-360-A1F6 | Cessna | 177 Cardinal |
| O-360-A1F6D | 177 Cardinal | |
| O-540-J3C5D | 182-RG Skylane | |
| IO-540-AB1A5 | 182-S | |
| O-360-F1A6 | C-172RG Cutlass RG | |
| IO-540-AC1A5 | C-206 Stationair | |
| R-G Cardinal | ||
| IO-360-A1B6D | R-G Cardinal | |
| TIO-540-AK1A | T182T Skylane | |
| O-540-L3C5D | TR-182 Turbo Skylane | |
| AEIO-540-D4A5 | Christen Pitts | S-2S, S-2B |
| IO-540-T4B5D | Commander | 114 |
| IO-540-T4B5 | 114B | |
| TIO-540-AG1A | 114TC | |
| Dornier | DO-28 | |
| IO-540-K1J5D | Embraer | EMB-201 Ipanema |
| O-540-B4B5 | EMB-710 Corioca | |
| EMB-720 Minuano | ||
| EMB-720 Minuano & EMB-721 Sertanejo | ||
| EMB-721 Sertanejo | ||
| AEIO-540-L1B5 | Extra-Flugzeugbau | Extra 300 |
| F.F.A | FFA-2000 Eurotrainer | |
| H.A.L | HPT-32 | |
| O-540-A1A5 | Helio Military | H-250 |
| AEIO-360-A1E6 | Integrated Systems | Omega |
| IO-540-M1C5 | King Engineering | Angel |
| Korean Air | Chang Gong-91 | |
| Lake | LA-4-200 Buccaneer | |
| O-540-J3A5 | Maule | |
| MT-7-260 & M-7-260 | ||
| MX-7-235 Star Rocket | ||
| IO-540-W1A5 | MX-7-235, MT-7-235 & M7-235 | |
| Mod Works | Trophy 212 Conversion | |
| IO-360-A3B6 | Mooney | 201 |
| M-201 | ||
| IO-360-A1B6 | M-20-J | |
| IO-360-A3B6D | M20J-201 | |
| TIO-540-AF1B | M20M TLS Bravo | |
| Moravan | Z143L Zlin | |
| Z242L Zlin | ||
| Partenavia | P-68 Series Observer | |
| IO-540-K1J5 | Piper | 600-A Aerostar |
| IO-540-S1A5 | 601-A, 601B & 601P Aerostar | |
| IO-540-AA1A5 | 602P Sequoia | |
| O-540-A1B5 | PA-23-235 Aztec & PA-24-250 Comanche | |
| PA-23-250 Aztec | ||
| IO-540-J4A5 | PA-23-250 Aztec | |
| IO-540-C1B5 | PA-23-250 Aztec & PA-24-250 Comanche | |
| TIO-540-C1A | PA-23-250T Turbo Aztec | |
| PA-24-150 Comanche | ||
| O-540-A1C5 | PA-24-250 Comanche | |
| O-540-A1D5 | PA-24-250 Comanche | |
| IO-540-D4A5 | PA-24-260 Comanche | |
| PA-24-260 Comanche | ||
| O-540-B2C5 | PA-25-235 Pawnee | |
| O-540-B2B5 | PA-28-235 Cherokee | |
| PA-28-235 Cherokee | ||
| IO-360-C1C6 | PA-28R-201 Arrow | |
| IO-540-M1A5 | PA-31-300 Navajo | |
| PA-32-260 Cherokee 6 | ||
| IO-540-K1G5 | PA-32-300 & PA-32-301 Saratoga | |
| IO-540-K1A5 | PA-32-300 Cherokee 6 | |
| IO-540-K1A5D | PA-32-300 Cherokee 6 | |
| IO-540-K1G5D | PA-32-300R Lance | |
| PA-32-301R Saratoga | ||
| IO-360-C1E6 | PA-34-200 Seneca I | |
| IO-540-K1G5 | PA-36-300 Brave | |
| O-360-A1H6 | PA-44-180 | |
| LO-360-A1H6 | PA-44-180 Seminole | |
| IO-540-K1K5 | T-35 Pillan | |
| Robin | R-3000/235 | |
| O-540-F1B5 | Robinson | R-44 |
| Rockwell | 114 | |
| Ruschmeyer | MF-85 | |
| Saab | MFI-15 Safari or MFI-17 Supporter | |
| Scottish Avia | Bulldog | |
| Siai Marchetti | S-205 | |
| Siai Marchetti | S-208 & SF-260 | |
| Siai Marchetti | SF-260 | |
| Siai Marchetti | SF-260 | |
| Slingsby | Firefly T3A | |
| Socata | R-235 Rallye Cuerrier | |
| Rallye 235CA | ||
| IO-540-C4D5D | TB-20 Trinidad | |
| TB-200 | ||
| TIO-540-AB1AD | TB-21 & TB-21-TC Trinidad TC | |
| IO-540-AB1A5 | Stoddard Hamilton | Glasair |
| IO-540-K1H5 | Stoddard Hamilton | Glasair III |
| IO-540-L1C5 | Swearingen Aircraft | SX-300 |
| Transava | T-300 Skyfarmer | |
| AEIO-360-A1B6 | Valmet | L-70 Vinka |
| Wassmer | WA4-21 | |
| Yoeman | Aviation YA-1 |
The FAA is adopting a new airworthiness directive (AD) for certain Lycoming Engines (formerly Textron Lycoming) AEIO-360, IO-360, O-360, LIO-360, LO-360, AEIO-540, IO-540, O-540, and TIO-540 series reciprocating engines rated at 300 horsepower (HP) or lower. This AD requires replacing certain crankshafts. This AD results from reports of 12 crankshaft failures in Lycoming 360 and 540 series engines rated at 300 HP or lower. We are issuing this AD to prevent failure of the crankshaft, which could result in total engine power loss, in-flight engine failure, and possible loss of the aircraft.
You are responsible for having the actions required by this AD performed within 50 hours time-in-service or 6 months after the effective date of this AD, whichever is earlier, unless the actions have already been done.
If Lycoming Engines manufactured new, rebuilt, or overhauled your engine before March 1, 1999, and you haven't had the crankshaft replaced, no further action is required.
For AEIO-540, IO-540, O-540, and TIO-540 series engines manufactured new or rebuilt, overhauled, or that had a crankshaft installed after March 1, 1999, do the following:
(1) If Table 1 or Table 2 of Lycoming Mandatory Service Bulletin (MSB) No. 566, dated July 11, 2005, lists your engine serial number (SN), use Table 4 to verify the crankshaft SN.
(2) If Table 4 of Lycoming MSB No. 566, dated July 11, 2005, lists your crankshaft SN, replace the crankshaft with a crankshaft that is not listed in Table 4 of Lycoming MSB No. 566, dated July 11, 2005.
For AEIO-360, IO-360, O-360, LIO-360, and LO-360 series engines manufactured new or rebuilt, overhauled, or that had a crankshaft installed after March 1, 1999, do the following:
(1) If Table 3 of Lycoming MSB No. 566, dated July 11, 2005, lists your engine SN, use Table 4 to verify the crankshaft SN.
(2) If Table 4 of Lycoming MSB No. 566, dated July 11, 2005, lists your crankshaft SN, replace the crankshaft with a crankshaft that is not listed in Table 4 of Lycoming MSB No. 566, dated July 11, 2005.
(i) After the effective date of this AD, do not install any crankshaft that has a SN listed in Table 4 of Lycoming MSB No. 566, dated July 11, 2005, into any engine.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
