# AD 81-14-04: Main Landing Gear Actuator Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Short Brothers SD3-30
- Effective: July 8, 1981
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-4152
- Registered aircraft: 4 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9603019597F8C6C0862569F300621935.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/81-14-04

## The airworthiness directive

81-14-04 SHORT BROTHERS LIMITED: Amendment 39-4152. Applies to Model SD3-30 series airplanes, certificated in all categories, which have Menasco Manufacturing main landing gear actuator assembly P/N 17900, Serial numbers MMC-003 through MMC-111, installed.

To prevent gear-up landing caused by the main landing gear actuator's inability to unlock, accomplish the following within 500 landings after the effective date of this AD, unless already accomplished:

Rework the actuator by cutting a venting groove across the contoured face of the profiled washer in accordance with Short Brothers Limited Service Bulletin No. SD3-32-86 Rev. 2 dated March 4, 1981, or later FAA approved revisions, or in a manner acceptable to the Chief, Seattle Area Aircraft Certification Office, FAA Northwest Region.

The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to the addresses listed above. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108.

This amendment becomes effective July 8, 1981.

## 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: 4 (4 by airframe model, 0 by engine model)
- Makers: Short Bros. & Harland 3, Short Bros 1

Models with the most aircraft:

- [Short Bros. & Harland SD3-30](https://openairdocs.org/model/short-bros-harland-sd3-30): 3 aircraft (airframe model)
- [Short Bros SD3-30](https://openairdocs.org/model/short-bros-sd3-30): 1 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/81-14-04/models.md
Every aircraft: https://openairdocs.org/ad/81-14-04/aircraft.md

Its text cites no advisory circulars or STCs.

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