# AD 52-28-02: Fuel Pump Relief Valve

- Type: Airworthiness directive
- Status: Current
- Products: Bellanca 14-13, 14-13-2 and 14-13-3
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 131 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/99658BA0F0BDC4C586256A340056F7AD.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/52-28-02

## The airworthiness directive

52-28-02 BELLANCA: Applies to Models 14-13, 14-13-2, 14-13-3 Aircraft, Serial Numbers Up to Number 1584.

Compliance required as soon as practicable, but not later than next engine overhaul after January 1, 1953.

In order to eliminate possible hazard due to excessive pressure from the engine-driven fuel pump, install a high-pressure relief valve between the fuel pump outlet and the inlet side of the hand wobble pump.

(Bellanca Service Bulletin No. 23 covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-773](https://openairdocs.org/tcds/A-773): Bellanca Aircraft Corporation; names 3 of 4 models: 14-13-3, 14-13-2, 14-13

## 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: 131 (131 by airframe model, 0 by engine model)
- Makers: Bellanca 131

Models with the most aircraft:

- [Bellanca 14-13-2](https://openairdocs.org/model/bellanca-14-13-2): 77 aircraft (airframe model)
- [Bellanca 14-13](https://openairdocs.org/model/bellanca-14-13): 43 aircraft (airframe model)
- [Bellanca 14-13-3](https://openairdocs.org/model/bellanca-14-13-3): 11 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/52-28-02/models.md
Every aircraft: https://openairdocs.org/ad/52-28-02/aircraft.md

Its text cites no advisory circulars or STCs.

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