Piper Service Bulletin No. 79
Applicability: Piper J-4 Cubs serial numbers 4-400 thru 4-634, 4-636, 4-638, 4-639 and 4-641
System: Wings
Issue Date: February 18, 1946
Subject: Nose Rib Structure Reinforcement
Summary: Describes the method to be used in reinforcing the nose structure of the ribs.
Open PDF: PIP_SB79.pdf