# AD 55-22-03: Fuel Tank Cap

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-22
- Published: December 4, 1956
- Issued: December 4, 1956
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 277 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EF1A8AF309D2E1D78625698B00764AB4.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/55-22-03

## The airworthiness directive

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.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1A6](https://openairdocs.org/tcds/1A6): Piper Aircraft Inc.; names 1 of 8 models: PA-22

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 277 (277 by airframe model, 0 by engine model)
- Makers: Piper 277

Models with the most aircraft:

- [Piper PA-22](https://openairdocs.org/model/piper-pa-22): 277 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/55-22-03/models.md
Every aircraft: https://openairdocs.org/ad/55-22-03/aircraft.md

Its text cites no advisory circulars or STCs.

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