# AD 47-10-06: Fuel Tank Shutoff Valves

- Type: Airworthiness directive
- Status: Current
- Products: Lockheed 49-46
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/273D86007D1BC08E8625696D00719EF8.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-10-06

## The airworthiness directive

47-10-06 LOCKHEED: (Was Mandatory Note 7 of AD-763-3.) Applies to All Model 49 Serials Incorporating Parker 4-1042-11-2 Plug Valves in the Fuel System.

Compliance required prior to March 15, 1947.

Rework all fuel tank shutoff and fuel cross transfer valves by installing new type shaft sealing rings, valve caps, packing caps, cap gaskets and cap attachment screws. This rework also applies to valves previously reworked, as identified by the use of countersunk head screws with star lock washers or fillister head screws.

(LAC Service Instruction 049/SI-74, revised September 9, 1946, or subsequent, covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-763](https://openairdocs.org/tcds/A-763): Lockheed Martin Aeronautics Company; names 1 of 6 models: 49-46

## 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: 1 (1 by airframe model, 0 by engine model)
- Makers: Lockheed 1

Models with the most aircraft:

- [Lockheed 49-46](https://openairdocs.org/model/lockheed-49-46): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/47-10-06/models.md
Every aircraft: https://openairdocs.org/ad/47-10-06/aircraft.md

Its text cites no advisory circulars or STCs.

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