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Lycoming Service Bulletin No. 645

WTF

Am I am a time warp? I thought we went through this with Lycomings just a few years ago? One would think they would be closely verifying the bushing size and seating pressure after the first AD. The bushings should not have made it to assembly, and the assembly pressure should have caused the assembly line to come to an instant halt before any rods got bolted on crankshafts.
 
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Any experimental engines listed?

I notice there is not any models beginning with "Y" for the engines purchased thru Vans. Intentional?
 
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