DATE: April 9, 2015
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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