Service Letter No. L 289

SERVICE LETTER NO. L289
Valve Spring Part Numbers
DATE POSTED:

March 2, 2022

TO:

All Owners, Operators, and Maintenance Providers of Lycoming Aircraft Engines

REASON FOR PUBLICATION:

Lycoming has released new valve springs with new part numbers that are interchangeable with the old valve springs.

Service Instruction No. 1587

SERVICE INSTRUCTION NO. 1587
DATE:

February 3, 2022

SUBJECT:

Reprint of AVStar Service Information Letter No. AFS-SIL-03

MODELS AFFECTED:

All Lycoming engine models with an AVStar LVC-3-3A, LVC-3-3PA, LVC-5-4PA, LVC-5-5BPA, LVC-5-5PA, LHC-6-6BPA & LHC-6-6BA

TIME OF COMPLIANCE:

Whenever adjustments are made to an AVStar carburetor installed on a Lycoming engine

Service Letter No. L 288

SERVICE LETTER NO. L288
Alternate Bolt Locking of Wastegate Solenoid Valve
DATE:

December 16, 2021

TO:

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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