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Service Bulletin

SB 591

Lycoming Engines

Issued
2010-05-10
Models covered
2

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SB

SB 591

Lycoming Engines

Issued 2010-05-10

Manufacturer's own classification: “Mandatory Service Bulletin”. The manufacturer's classification is not an FAA requirement.

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.

Reprint of Kelly Mandatory Service Bulletin No. 039A, Turbine Wheel Replacement

Source: Lycoming Engines, retrieved 2026-09-01

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

Applies to 2 models in our index

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