Service Instruction No. 1424 A

Installation Procedure for P/N 15B26066 Hydraulic Tappet/Plunger Assemblies

  • Publications

Supersedes Service Instruction No. 1424

December 15, 2009

MODELS AFFECTED

All Lycoming reciprocating engines using P/N 15B26066 except: O-235 series; O-320-H series; O, LO, TO, LTO-360-E series; and TIO, TIGO-541 series.

TIME OF COMPLIANCE

Any time new P/N 15B26066, hydraulic tappet plunger assemblies, are installed.

Whenever a new plunger assembly is installed, perform the following steps to ensure that the plunger does not stick in the collapsed position.

Product Support Network

Wherever you are in the world, you have access to exceptional expertise and knowledge about Lycoming engines. Get the most comprehensive customer service and support in the general aviation industry.

Get It Exchanged

Use our Engine Exchange Program to order a new, rebuilt, or overhauled engine to experience more airtime and less downtime.