Supplement No. 5 to Service Bulletin No. 554

Crankshaft Gear Retaining Bolt Replacement Supplement 5

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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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Related Publication

Service Bulletin No. 554

For more information on this subject, refer to Service Bulletin No. 554.