Service Instruction No. 1585 A

Oil Cooler Bypass Valve Assembly Replacement

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SERVICE INSTRUCTION NO. 1585A
DATE:

December 1, 2023

SUBJECT:

Oil Cooler Bypass Valve Assembly Replacement

REASON FOR REVISION:

Revised the first paragraph and replacement instructions based on the option to use either Oil Cooler Bypass Valve Assembly P/N 53E29909 or Oil Cooler Bypass Valve Assembly P/N 53E22144

MODELS AFFECTED:

Lycoming TEO-540-C1A

TIME OF COMPLIANCE:

At owner’s discretion

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