# AD 78-03-02: Main Landing Gear

- Type: Airworthiness directive
- Status: Current
- Products: Gulfstream Aerospace G-1159
- Effective: February 3, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-3134
- Registered aircraft: 14 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BFD0974D603511B6862569B50074C91E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/78-03-02

## The airworthiness directive

78-03-02 GRUMMAN AMERICAN AVIATION CORPORATION: Amendment 39- 3134. Applies to Grumman American Aviation Corporation Model G-1159 airplanes, all serial numbers certificated in all categories.

COMPLIANCE: Compliance is required as indicated.

To prevent possible main landing gear failures, accomplish the following:

      (A) Inspect the main landing gear prior to the next flight after the effective date of this A.D. to determine if part number 1159SC-L202-11 or 1159SC-L202-13 side brace/actuating cylinders are installed.

      (B) Within the next ten landing gear operating cycles after the effective date of this A.D., replace all P/N 1159SC-L202-13 actuators with modified units identified as 1159SC-L202- 13A in accordance with Grumman American Aviation Corporation Mandatory Customer Bulletin #261 dated January 27, 1978.

      (C) Within the next 100 landing gear operating cycles after the effective date of this A.D., inspect all P/N 1159SC-L202-11 actuators in accordance with Grumman American Mandatory Customer Bulletin #261 dated January 27, 1978, and if found defective, replace with modified units identified as 1159SC-L202-11A or -13A.

      (D) Remove from the aircraft any 1159SC-L202-11A or 1159SC-L202-13A actuator upon accumulating more than 500 actuator cycles and replace with an allowable actuator having less than 500 cycles.

      (E) An alternate method of compliance with paragraphs (B), (C), or (D) of this A.D. may be used if approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region.

This amendment becomes effective February 3, 1978.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A12EA](https://openairdocs.org/tcds/A12EA): Gulfstream Aerospace Corporation; names 1 of 7 models: G-1159

## 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: 14 (14 by airframe model, 0 by engine model)
- Makers: Grumman 8, Grumman American Avn. 4, Gulfstream American 2

Models with the most aircraft:

- [Grumman G-1159](https://openairdocs.org/model/grumman-g-1159): 8 aircraft (airframe model)
- [Grumman American Avn. G-1159](https://openairdocs.org/model/grumman-american-avn-g-1159): 4 aircraft (airframe model)
- [Gulfstream American G-1159](https://openairdocs.org/model/gulfstream-american-g-1159): 2 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/78-03-02/models.md
Every aircraft: https://openairdocs.org/ad/78-03-02/aircraft.md

Its text cites no advisory circulars or STCs.

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