Service Instruction No. 1285 F

Non-Destructive Testing of Lycoming Engine Parts

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Supersedes Service Instruction No. 1285D and Supplement No. 1 to Service Instruction No. 1285D

July 18, 2017

MODELS AFFECTED

All Lycoming engines

TIME OF COMPLIANCE

During engine overhaul or as required

REASON FOR REVISION

Revised NOTICE on page 2 regarding grit blast medium

This Service Instruction includes a directive advising not to use visible dye in Non-Destructive Testing (NDT) because it can adversely affect future results of NDT. This Service Instruction also identifies the necessary personnel qualifications and inspection procedure requirements for NDT to be done on Lycoming engine components. The purpose of the NDT is to identify the presence or potential of structural failures in an engine component. Non-destructive testing within the context of this Service Instruction includes Magnetic Particle Inspection and Fluorescent Penetrant Inspection.

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