SERVICE LETTER NO. L288
Alternate Bolt Locking of Wastegate Solenoid Valve
December 16, 2021
Owners and Operators of Lycoming TEO-540-C1A
REASON FOR PUBLICATION:
This Service Letter announces that the repetitive need to remove and install safety wire on the solenoid valve attaching bolt can be eliminated by usage of lock washer P/N STD-160 in combination with Loctite® 243 or equivalent.
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