# AD 51-10-01: Wing Flap Operating Link

- Type: Airworthiness directive
- Status: Current
- Products: Boeing DC-6, DC-6A and DC-6B
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 17 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9CF64571779068E8862569BC0061B727.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/51-10-01

## The airworthiness directive

51-10-01 DOUGLAS: Applies to All Model DC-6 Aircraft.

Compliance required at first engine change after receipt of parts but not later than June 1, 1952.

In order to increase the strength of the wing flap operating link assembly at wing Station 281, and to replace the temporary reworks of the present links as outlined in Douglas General Service Letter DC-6 No. 60, the following should be accomplished:

  (a) Replace wing flap operating link assembly, P/N 4330069, with new heavier link, P/N 4393814.

  (b) Visually inspect 4330069 links every 60 hours of operation until replacement per item (a), is accomplished. If links have been reworked and shotpeened per Douglas General Service Letter DC-6 No. 60, inspect every 500 hours of operation until replacement is made.

(Douglas General Service Letter DC-6 No. 60 covers this same subject.)

## Affected data sheets (3) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [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: 17 (17 by airframe model, 0 by engine model)
- Makers: Douglas 17

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-6](https://openairdocs.org/model/douglas-dc-6): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/51-10-01/models.md
Every aircraft: https://openairdocs.org/ad/51-10-01/aircraft.md

Its text cites no advisory circulars or STCs.

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