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Service Bulletin

SB 475C

Lycoming Engines

Issued
2003-01-30
Models covered
8

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SB

SB 475C

Lycoming Engines

Issued 2003-01-30

Crankshaft Gear Modification and Assembly Procedures

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.

Source: Lycoming Engines, retrieved 2026-08-16

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

Applies to 8 models in our index