# AD 74-12-04: Automatic Flight Control System

- Type: Airworthiness directive
- Status: Current
- Products: Gulfstream Aerospace G-1159
- Effective: May 30, 1974
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-1851
- Registered aircraft: 14 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A22913B89A41F94A862569B500724286.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/74-12-04

## The airworthiness directive

74-12-04 R2 GRUMMAN AMERICAN AVIATION CORPORATION: Amendment 39- 1851 Applies to Grumman G-1159 airplanes certificated in all categories.

Compliance required within the next 100 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent operation of the pitch trim at a greater rate when an additional signal in the opposite direction is selected, modify the Automatic Flight Control System junction box in accordance with Grumman American Aviation Corporation, Aircraft Service Change 143, or an equivalent modification approved by the Chief, Engineering and Manufacturing Branch, FAA Southern Region.

This amendment becomes effective May 30, 1974.

## 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/74-12-04/models.md
Every aircraft: https://openairdocs.org/ad/74-12-04/aircraft.md

Its text cites no advisory circulars or STCs.

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