SI 1483

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Lycoming Engines

Issued 2010-12-21

NOT AN FAA REQUIREMENT — This is a manufacturer document. It is not an FAA Airworthiness Directive and compliance is not required by 14 CFR 39 unless an AD cites it.

Valve Leak Check with Engine Cylinder Removed

Source: Lycoming Engines, retrieved 2026-09-01

View on Lycoming Engines' site

Applies to 8 models in our index

Lycoming IO-390 Lycoming Engines · engine
Lycoming IO-580 Lycoming Engines · engine
Lycoming IO-720 Lycoming Engines · engine
Lycoming O-235 Lycoming Engines · engine
Lycoming O-320 Lycoming Engines · engine
Lycoming O-360 Lycoming Engines · engine
Lycoming O-435 Lycoming Engines · engine
Lycoming O-540 Lycoming Engines · engine