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Service Instruction

SI 1143

Lycoming Engines

Issued
2011-11-10
Models covered
5

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SI

SI 1143

Lycoming Engines

Issued 2011-11-10

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.

Counterweight Bushing Inspection, Replacement, and Special Tooling Upgrades

Source: Lycoming Engines, retrieved 2026-09-01

View on Lycoming Engines' site (opens in a new tab)

Applies to 5 models in our index

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