DATE: August 15, 2003
Supplement No. 5 to Service Bulletin No. 554 does not supersede Supplement No. 3 to Service Bulletin No. 554 or Supplement No. 4 to Service Bulletin No. 554.
After extensive and thorough search of all engine and gear bolt records, Lycoming has determined that there are an additional 161 engines that could possibly have one of the suspect bolts. This Supplement No. 5 to Service Bulletin No. 554 is issued to ensure that these bolts are replaced.
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Service Bulletin No. 554
For more information on this subject, refer to Service Bulletin No. 554.