Piper Service Bulletin No. 4
Applicability: All Piper models manufactured up to and including December 1945
Issue Date: February 15, 1946
Subject: Fuel System Maintenance
Summary: As a safety precaution, it is advisable to remove the fuel drain fitting and clean off all accumulations of foreign matter in the screen every 100 hours of flight.
Open PDF: PIP_SB04.pdf