Piper Service Bulletin No. 71
Applicability: Piper J-3, J-4 and J-5 Series airplanes with exhaust mufflers
Issue Date: February 20, 1946
Subject: Exhaust Muffler Inspection and Repair
Summary: Inspecting for cracks at or near the weld beads at the attachment of the muffler outer shell to the end plates.
Open PDF: PIP_SB71.pdf