From the FAA
SAIB No. NE-01-37, applies to Lycoming IO-540 and TIO-540 engines with 300 hp or greater and addresses front main bearings P/N LW-1388T installed after August 24, 2000. Lycoming has reported six events of front main bearings delaminating and liberating metal particles into the oil system that accumulates in the oil filter. This could lead to an engine seizure and in-flight shutdown. Highly recommend performing oil filter inspections in accordance with Lycoming Mandatory SB 480D, which can be accessed on the Internet at: www.lycoming.textron.com/main.html. You may also contact Lycoming by telephone at (570) 323-6181.
avbug said:
SAIB No. NE-01-37, applies to Lycoming IO-540 and TIO-540 engines with 300 hp or greater and addresses front main bearings P/N LW-1388T installed after August 24, 2000. Lycoming has reported six events of front main bearings delaminating and liberating metal particles into the oil system that accumulates in the oil filter. This could lead to an engine seizure and in-flight shutdown. Highly recommend performing oil filter inspections in accordance with Lycoming Mandatory SB 480D, which can be accessed on the Internet at: www.lycoming.textron.com/main.html. You may also contact Lycoming by telephone at (570) 323-6181.
