Engine Pushrods

Editorial Staff

Monday, July 26, 2021 at 10:11 AM ET

Verified

Key Takeaways:

Multiple Cessna and Piper aircraft experienced failures, abnormal wear, or excessive wear of engine pushrods and rocker arms.
Reported causes included stuck valves, insufficient lubrication or oil starvation, and a suspected design flaw in Lycoming's new-style roller tappet engines.
These component issues led to symptoms such as rough engine operation, metal contamination in oil, and in severe cases, extensive internal engine damage.
Incidents occurred across a wide range of part total times, from recently replaced components to those with over 1700 hours of operation.

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Cessna 172N Skyhawk

Broken Pushrod

Editorial Staff