Service Instruction No. 1368 A
Tachometer Adapter Seal Washer and Retainer
Publications
Supersedes Service Instruction No. 1368
November 24, 2025
MODELS AFFECTED
All O-320-H2AD 76 series engines.
TIME OF COMPLIANCE
Whenever oil leakage occurs at the tachometer adapter seal.
REASON FOR REVISION
Split Step 1 into 2 steps. Added new Figure 1 to identify part numbers.