Service Bulletin No. 619

Hardness Check for Rocker Arm, Part Number LW-15014

Publications

DATE: April 9, 2015

MODELS AFFECTED

O-320-H2AD, O, LO, TO, LTO-360-E1A6D.

TIME OF COMPLIANCE

Refer to Table 1 in the attached bulletin.

This Service Bulletin is in response to a single field report of one excessively worn rocker arm found during an investigation of reported engine roughness. Results of material analysis at Lycoming Engines show that the rocker arm had not been case hardened, as required, during manufacturing.

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