Piper Service Bulletin No. 218
Applicability:
- Piper PA-18
- Piper PA-22-108
- Piper PA-23-235 and PA-23-250
- Piper PA-24 and PA-24 "250"
- Piper PA-30
System: Engine
Issue Date: November 11, 1963
Subject: Replacement of Vacuum Pump Splined Coupling
Summary: Reports of the vacuum pump splined coupling on Airborne Mechanisms Vacuum Pumps Models 113A5 and 113A8 may fail prematurely as a result of over-curing.
Open PDF: PIP_SB218.pdf