Piper Service Bulletin No. 28
Applicability: Piper J4 Cub serial numbers 4-400 thru 4-769
Issue Date: February 18, 1946
Subject: Electrical Wiring
Summary: Information about certain features in the electrical wiring system of the Piper J-4 aircraft which the Civil Aviation Authority feels should be corrected.
Open PDF: PIP_SB28.pdf