AircraftDirectives
Menu
Service Instruction

SI 1521

Lycoming Engines

Issued
2008-11-19
Models covered
4

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

SI

SI 1521

Lycoming Engines

Issued 2008-11-19

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 Precision Service Information Letter No. SIL RS-35 Revision 1

Source: Lycoming Engines, retrieved 2026-09-01

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

Applies to 4 models in our index

Search