DATE:May 5, 2006 MODELS AFFECTED Lycoming IO-540-AC1A5, TIO-540-AJ1A model engines. TIME OF COMPLIANCE Same as required for Sky-Tec Service Bulletin No. 2006-3-1. This reprint is current at the time Lycoming Service Bulletin No. 571 is issued. However, when complying with this Service Bulletin, insure that compliance is in accordance with the latest revision of Sky-Tec Service Bulletin No. 2006-3...

Supersedes Service Bulletin No. 569 Aprl 11, 2006 MODELS AFFECTED Any Lycoming engine model specified below manufactures, rebuilt, overhauled, or repaired after March 1, 1997: Lycoming counterweighted (L)IO-360, and AEIO-360 engines described in section 1. Lycoming IO-390 and AEIO-590 engines described in Section 2. Lycoming O-540, IO-540, AEIO-540 and (L)TIO-540 engines described in Section 3...

DATE: November 30, 2005 MODELS AFFECTED Any Lycoming engine model specified below manufactured, rebuilt, overhauled or repaired after March 1, 1999: Lycoming counterweighted (L)O-360, (L)IO-360 and AEIO-360 engines rated at any horsepower as listed in Table 1. Any overhauled or repaired Lycoming counterweighted (L)O-360, (L)IO- 360 or AEIO-360 engine that has had a crankshaft replaced after March...

DATE: July 11, 2005 MODELS AFFECTED Any Lycoming engine model specified below manufactured, rebuilt, overhauled or repaired after March 1, 1999: Lycoming O-540, IO-540, AEIO-540 and TIO-540 engines rated at 290 horsepower or lower as described in Section 1 and listed in Table 1. Lycoming IO-540-P, -S, -AA engines rated at 250-290 horsepower by Lycoming as described in Section 2 and listed in Table...

Supersedes Service Bulletin No. 530A November 22, 2004 MODELS AFFECTED The following Lycoming four cylinder engines which utilize fixed pitch propellers except new engines shipped after February 15, 1997. All 235 series engines; All 290 series engines; All 320 series engines; and All 180 horsepower, 360 series engines except O-360-A4A, -A4AD, -A4D, -A4G, -A4J, -A4K, -A4M, -A4N, -A4P, -A5AD, -C4F,...

Supersedes Service Bulletin No. 388B and Supplement No. 1 to Service Bulletin No. 388B November 22, 2004 TIME OF COMPLIANCE Helicopter Engines – 300 hour intervals or earlier if valve sticking suspected. All Other Engines – 400 hour intervals or earlier if valve sticking suspected until exhaust valve guides are replaced with guides made of improved material. (Refer to latest revision of Service...

DATE: August 6, 2004 MODELS AFFECTED Any Lycoming factory new or overhauled model (L)TIO-540-U2A, -V2AD, and -W2A engines listed on ATTACHMENT I. Any (L)TIO-540-U2A, -V2AD or -W2A engines that have had genuine Lycoming P/N LW-13212 connecting rod bearing installed during field overhaul or field maintenance between August 25, 1995 and the date of this Service Bulletin. TIME OF COMPLIANCE Replace...

DATE: March 23, 2004 MODELS AFFECTED Lycoming new, rebuilt or overhauled engines employing Kelly Aerospace Power Systems starters with Lycoming P/N 31A22470, P/N 31A22472, P/N 31A22473, P/N 31B22474, P/N 31B22475, P/N 31B22476, P/N 31B22477. TIME OF COMPLIANCE Same as required for Kelly Aerospace Power Systems Service Bulletin No. A- 112, Rev. A. Kelly Aerospace Power Systems Service Bulletin No...

DATE: November 17, 2003 MODELS AFFECTED See attached list for engine models and serial numbers. Spares with part numbers 56A22634-01 and 56A22634-02 that were shipped from Lycoming between June 21, 2002 and April 17, 2003 are also affected by this Service Bulletin. TIME OF COMPLIANCE Next oil change or next 50-hour inspection. Lycoming has determined that some oil sumps made from C56B19855...