SB-48 Piper J-4 Muffler Inspection to Prevent Engine Failure

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