# AD 61-08-01: Fuel Transfer

- Type: Airworthiness directive
- Status: Current
- Products: Boeing DC-6, DC-6A, DC-6B, DC-7, DC-7B and DC-7C
- Effective: May 9, 1961
- Published: April 8, 1961
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 22 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A2A33518EFE71F56862569BC0073EDA3.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/61-08-01

## The airworthiness directive

61-08-01 DOUGLAS: Amdt. 273 Part 507 Federal Register April 8, 1961. Applies to All DC-6 and DC-7 Series Airplanes Which Do Not Have Antifuel Transfer Check Valves Installed In The Fuel System.

Compliance required within the next 330 hours' time in service.

  (a) Install a placard in the flight compartment in full view of the pilot to read as follows: "Fuel Transfer in Flight Prohibited."

  (b) Revise the operations procedures section covering fuel system management in the FAA approved airplane flight manual to incorporate fuel system operation procedures in accordance with the above placard and delete the item which states that check valves are installed. Flight manual revisions must be approved by FAA.

When check valves to prevent transfer of fuel are installed, this AD is no longer applicable.

(Douglas Service Bulletin No. DC-6-294 dated November 19, 1948, revised February 17, 1950, covers an acceptable installation of check valves.)

This directive effective May 9, 1961.

## Affected data sheets (4) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 4A10](https://openairdocs.org/tcds/4A10): The Boeing Company; names 3 of 3 models: DC-7, DC-7C, DC-7B
- [TCDS 6A3](https://openairdocs.org/tcds/6A3): The Boeing Company; names 1 of 3 models: DC-6A
- [TCDS 6A4](https://openairdocs.org/tcds/6A4): The Boeing Company; names 1 of 2 models: DC-6B
- [TCDS A-781](https://openairdocs.org/tcds/A-781): The Boeing Company; names 1 of 1 models: DC-6

## 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: 22 (22 by airframe model, 0 by engine model)
- Makers: Douglas 22

Models with the most aircraft:

- [Douglas DC-6B](https://openairdocs.org/model/douglas-dc-6b): 9 aircraft (airframe model)
- [Douglas DC-6A](https://openairdocs.org/model/douglas-dc-6a): 7 aircraft (airframe model)
- [Douglas DC-7](https://openairdocs.org/model/douglas-dc-7): 2 aircraft (airframe model)
- [Douglas DC-7B](https://openairdocs.org/model/douglas-dc-7b): 2 aircraft (airframe model)
- [Douglas DC-6](https://openairdocs.org/model/douglas-dc-6): 1 aircraft (airframe model)
- [Douglas DC-7C](https://openairdocs.org/model/douglas-dc-7c): 1 aircraft (airframe model)

All 6 models: https://openairdocs.org/ad/61-08-01/models.md
Every aircraft: https://openairdocs.org/ad/61-08-01/aircraft.md

Its text cites no advisory circulars or STCs.

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