Service Instruction No. 1565 A

Replacement Thermostatic Oil Cooler Bypass Valves

Publications
DATE:

May 4, 2017

MODELS AFFECTED:

Lycoming engines using a thermostatic oil cooler bypass valve

TIME OF COMPLIANCE:

At overhaul or when necessary to replace the thermostatic oil cooler bypass valve

REASON FOR REVISION: 

Clarify replacement valve part numbers for specific Lycoming engine models

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