Airworthiness Directive · Amendment 39-14525 · Lycoming Engines (Formerly Textron Lycoming) AEIO-360, IO-360, O-360, LIO-360, and LO-360 Series Reciprocating Engines
Lycoming Engines (Formerly Textron Lycoming) AEIO-360, IO-360, O-360, LIO-360, and LO-360 Series Reciprocating Engines
This AD applies to Lycoming Engines AEIO-360, IO-360, O-360, LIO-360, and LO-360 series reciprocating engines, manufactured new or rebuilt, overhauled, 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 |
|---|---|---|
| AEIO-360-A1B6 | Moravan | Z242L Zlin |
| Scottish Avia | Bulldog | |
| Valmet | L-70 Vinka | |
| AEIO-360-A1E6 | Integrated Systems | Omega |
| IO-360-A1B6 | Aircraft Manufacturing Factory | Mushshak |
| Beech | C-24R Sierra or 200 Sierra | |
| Cessna | R-G Cardinal | |
| Korean Air | Chang Gong-91 | |
| Lake | LA-4-200 Buccaneer | |
| Mooney | M-20-J | |
| Partenavia | P-68 Series Observer | |
| Saab | MFI-15 Safari or MFI-17 Supporter | |
| Scottish Avia | Bulldog | |
| Socata | TB-200 | |
| IO-360-A1B6D | Cessna | R-G Cardinal |
| Mooney | M-201 | |
| Siai Marchetti | S-205 | |
| IO-360-A3B6 | Mooney | M-201 |
| Mod Works | Trophy 212 Conversion | |
| IO-360-A3B6D | Mooney | M20J-201 |
| IO-360-C1C6 | Piper | PA-28R-201 Arrow |
| Ruschmeyer | MF-85 | |
| IO-360-B1G6 | American | Blimp |
| IO-360-C1G6 | Zeppelin | Blimp |
| IO-360-C1E6 | Piper | PA-34-200 Seneca I |
| LO-360-A1G6D | Beech | 76 Duchess |
| LO-360-A1H6 | Piper | PA-44-180 Seminole |
| O-360-A1F6 | Cessna | 177 Cardinal |
| O-360-A1F6D | Cessna | 177 Cardinal |
| O-360-A1G6D | Beech | 76 Duchess |
| O-360-A1H6 | Piper | PA-44-180 |
| O-360-E1A6D | Piper | PA-44-180 |
| O-360-F1A6 | Cessna | C-172RG Cutlass RG |
| IO-360-C1D6 | Sold as a spare engine | |
| LIO-360-C1E6 | Sold as a spare engine | |
| LO-360-E1A6d | Sold as a spare engine | |
| LIO-360-C1D6 | Sold as a spare engine |
The FAA is adopting a new airworthiness directive (AD) for certain Lycoming Engines (formerly Textron Lycoming) AEIO-360, IO-360, O-360, LIO-360, and LO-360 series reciprocating engines. This AD requires replacing certain crankshafts. This AD results from a crankshaft failure in a Lycoming LO-360-A1H6 reciprocating engine. 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.
(f) If Lycoming Engines manufactured new, rebuilt, overhauled, or replaced the crankshaft in your engine before March 1, 1999, and you haven't had the crankshaft replaced, no further action is required.
(g) If Table 1 of Supplement No. 1 to Lycoming Mandatory Service Bulletin (MSB) No. 566, dated November 30, 2005, lists your engine serial number (SN), use Table 2 of Supplement No. 1 to verify if your crankshaft SN is listed.
(h) If Table 1 of Supplement No. 1 to Lycoming MSB No. 566, dated November 30, 2005, does not list your engine SN, use Table 2 of Supplement No. 1 to verify if your crankshaft SN is listed, if an affected crankshaft was installed as a replacement.
(i) If Table 2 of Supplement No. 1 to Lycoming Engines MSB No. 566, dated November 30, 2005, lists your crankshaft SN, replace the crankshaft with a crankshaft that is not listed in Table 2 of Supplement No. 1 to Lycoming MSB No. 566, dated July 11, 2005.
(j) The engine and crankshaft SNs listed in Table 1 and Table 2 of Supplement No.1 to Lycoming Engines MSB No. 566 are different from the engine and crankshaft SNs affected by Lycoming MSBs No. 552, No. 553 and No. 566; and ADs 2002-19-03 and 2005-19-11.
After the effective date of this AD, do not install any crankshaft that has a SN listed in Table 2 of Supplement No. 1 to Lycoming MSB No. 566, dated November 30, 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.
