Service Instruction No. 1424 A
Installation Procedure for P/N 15B26066 Hydraulic Tappet/Plunger Assemblies
Supersedes Service Instruction No. 1424
December 15, 2009
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.
Get It Exchanged
Use our Engine Exchange Program to order a new, rebuilt, or overhauled engine to experience more airtime and less downtime.