Piper Service Bulletin No. 148A
Applicability: Piper PA-18-18A, L21B and PA-22
Issue Date: May 29, 1957
Subject: Fuel Tank Caps
Summary: A recent design change to the fuel tank caps has created a possible hazard to the venting system and it is therefore requested that the caps be reworked in the following manner.
Open PDF: PIP_SB148A.pdf