EASA SIB NE-10-27: Lycoming Engines - Superior Air Parts (SAP) Oil Filter Adapter P/N SL2157.

What to do

Operators and maintenance personnel should verify if the SAP oil filter adapter P/N SL2157 is installed on their Lycoming reciprocating engines. They must only install approved oil filters with internal oil pressure by-pass valves as specified in the bulletin and referenced SAP Service Letter L09-01 A. No modifications to the adapter to accept other filters should be made. There is no specified compliance deadline.

Summary

The FAA Special Airworthiness Information Bulletin SAIB: NE-10-27 provides information regarding the use of Superior Air Parts (SAP) oil filter adapter part number SL2157 installed on certain Lycoming Engines reciprocating engines. It alerts operators and maintenance personnel about potential issues when incorrect oil filters without internal oil pressure by-pass valves are installed on this adapter. The bulletin clarifies that only specific Champion and Tempest oil filters with internal by-pass valves are eligible for use with the SAP oil filter adapter SL2157.

What changed

This bulletin introduces an advisory regarding the correct installation of oil filters on the SAP oil filter adapter P/N SL2157. It identifies that only Champion CH48108-1, CH48109-1, or Tempest AA48108, AA48109 oil filters with internal oil pressure by-pass valves should be used. It also warns against modifying the adapter to accept other oil filters.

Why it matters

This information is critical for aviation professionals to prevent engine oil starvation caused by improper oil filter installation, which can lead to engine damage or failure. Operators, maintenance organizations, and repair facilities must ensure compliance to maintain engine reliability and safety. Understanding the correct filter compatibility helps avoid costly repairs and potential safety risks.