Service Bulletin

SB 671

Lycoming Engines

Issued: 2026-08-24
Revision: -
Document type: SB
Models covered: 0

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SB 671

Lycoming Engines

Issued 2026-08-24

Manufacturer - not an FAA rule

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.

Fuel Pump Leak Inspection and Diaphragm Replacement, Hartzell Engine Tech (HET) Alert Service Bulletin No.233

Source: Lycoming Engines, retrieved 2026-09-01

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