Piper Service Bulletin No. 48
Applicability: Piper J-4A and J-4F serial numbers 4-828 thru 4-1384
System: Exhaust
Issue Date: February 20, 1946
Subject: Muffler: Baffle End Failures, Inspection, Preventing Engine Failure
Summary: Remedial measures for preventing muffler and engine failures.
Open PDF: PIP_SB48.pdf