# AD 78-13-01: Main Landing Gear

- Type: Airworthiness directive
- Status: Current
- Products: Short Brothers SD3-30
- Effective: July 5, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-3243
- Registered aircraft: 4 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E1A3602219A72397862569BB00699280.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/78-13-01

## The airworthiness directive

78-13-01 SHORT BROTHERS LIMITED: Amendment 39-3243. Applies to Model SD3-30 airplanes, S/N's 3003 through 3015, certificated in all categories.

Compliance is required as indicated unless already accomplished.

To prevent possible collapse of the main landing gear, prior to the accumulation of 50 landings after the effective date of this AD, install a one way restrictor valve, Menasco P/N 17516-1 or 17517-1, and associated hardware in the main landing gear retraction/extension system (R/H and L/H) in accordance with section 2, "Accomplishment Instructions" and figures 1, 2, and 3, of Short Brothers Limited Service Bulletin SD3-32-41, dated March 23, 1978, or an FAA approved equivalent.

This amendment becomes effective July 5, 1978.

## 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/78-13-01/models.md
Every aircraft: https://openairdocs.org/ad/78-13-01/aircraft.md

Its text cites no advisory circulars or STCs.

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