Service Bulletin

SB 649

Lycoming Engines

Issued: 2023-02-10
Models covered: 1

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SB 649

Lycoming Engines

Issued 2023-02-10

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.

INSTALLATION OF CORRECT ELECTRONIC IGNITION SYSTEM (EIS)

Source: Lycoming Engines, retrieved 2026-09-01

View on Lycoming Engines' site

Applies to 1 model in our index

Lycoming O-540 Lycoming Engines · engine