SI 1549

Opens your browser's print dialog. Choose “Save as PDF” to export a file. Keyboard: Ctrl+P or Cmd+P.

Lycoming Engines

Issued 2012-06-27

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.

Notification of Approved Fuel Pump Plunger P/N 23D26777

Source: Lycoming Engines, retrieved 2026-09-01

View on Lycoming Engines' site

Applies to 8 models in our index

Lycoming IO-390 Lycoming Engines · engine
Lycoming IO-580 Lycoming Engines · engine
Lycoming IO-720 Lycoming Engines · engine
Lycoming O-235 Lycoming Engines · engine
Lycoming O-320 Lycoming Engines · engine
Lycoming O-360 Lycoming Engines · engine
Lycoming O-435 Lycoming Engines · engine
Lycoming O-540 Lycoming Engines · engine