Service Instruction No. 1454 A 

Rocker Arm Assembly Replacement Part 

Publications

February 25, 2011 

MODELS AFFECTED

All Lycoming engines incorporating parallel valves except O­235 Series, O­290 Series, O­320­H Series and TO­360­E Series.

TIME OF COMPLIANCE

Anytime valve rocker assemblies are removed. 

This Service Instruction identifies Rocker Arm Assembly P/N  17F19357 to be  installed  on the  parallel  intake and exhaust valves on all cylinders. Rocker Arm Assembly P/N 17F19357 supersedes Rocker Arm  Assembly P/N 17F19353 

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