55-22-03 PIPER: Applies to All Model PA-22 Aircraft.
Compliance required as soon as possible but not later than November 30, 1955.
To prevent rain water from entering the fuel tanks, all Piper PA-22 aircraft must be equipped with new type fuel tank cap Piper P/N 454039 installed. This cap incorporates a redesigned venting system and a gasket seal of black composition rubber ring in place of the fiber gasket on the old type caps.