Piper Service Bulletin No. 153A
Applicability: Piper PA-22 serial numbers 22-1 thru 22-7999
System: Brake
Issue Date: November 21, 1960
Subject: Brake Master Cylinder Diaphragm
Summary: Failures of the diaphragm in the B711 Scott Master Cylinder used on the PA-22 Tri-Pacer within 300 or 400 hours of operation.
Open PDF: PIP_SB153A.pdf