# AD 78-12-07: Fuel Selector Valve

- Type: Airworthiness directive
- Status: Current
- Products: Piper PA-30 and PA-39
- Effective: June 19, 1978
- Published: June 15, 1978
- Issued: June 5, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3235
- Registered aircraft: 960 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/704A92721FD9D00F8625699E004ADC3F.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ad/78-12-07

## The airworthiness directive

78-12-07 PIPER: Amendment 39-3235. Applies to Piper Aircraft PA-30 and PA-39 with Serial Numbers 30-1 through 30-2000 and 39-1 through 39-155 which have had a right fuel selector valve P/N 492137 (Airborne P/N 1H7-8) changed since April, 1977, with a valve containing the designation "4C" in the valve serial number.

Compliance required before further flight unless already accomplished.

1. Replace any right fuel selector valve, Piper P/N 492137 (Airborne P/N 1H7-8) containing the designation "4C" in the valve serial number with a serviceable valve without the "4C" designation.

2. The replacement fuel selector valve shall be installed and adjusted in accordance with PA-30/39 Service Manual.

(Piper Service Bulletin No. 597 dated April 19, 1978, pertains to this subject.)

This amendment is effective June 19, 1978.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A1EA](https://openairdocs.org/tcds/A1EA): Piper Aircraft Inc.; names 2 of 3 models: PA-30, PA-39

## 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: 960 (960 by airframe model, 0 by engine model)
- Makers: Piper 960

Models with the most aircraft:

- [Piper PA-30](https://openairdocs.org/model/piper-pa-30): 878 aircraft (airframe model)
- [Piper PA-39](https://openairdocs.org/model/piper-pa-39): 82 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/78-12-07/models.md
Every aircraft: https://openairdocs.org/ad/78-12-07/aircraft.md

Its text cites no advisory circulars or STCs.

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