Piper PA-22 Colt — Service Bulletins

This Service Bulletin No. 819 issued by Piper Aircraft Corporation addresses corrosion issues in the fuselage door frame tube of several aircraft models, including the Piper PA-22 Colt. The bulletin is considered mandatory for compliance within 25 flight hours or six months, whichever comes first. It outlines the inspection and repair procedures necessary to ensure the structural integrity of the fuselage is maintained. The bulletin emphasizes the importance of addressing excessive rust and corrosion found between steel tubing and preformed sheet steel, which can compromise the aircraft's safety. Detailed instructions for inspection, repair, and corrosion protection are provided, along with material specifications and compliance logging requirements.

• Compliance is mandatory within 25 flight hours or 6 months.
• Inspect for corrosion in door frames, windshields, and baggage areas.
• Use .032" 4130N steel for replacement parts with a 0.12" minimum bend radius.
• Coat blind areas with corrosion inhibitors like hot linseed oil.
• Document compliance with a logbook entry.