# AD 79-05-07: Fuel Leakage in Tank Ribs

- Type: Airworthiness directive
- Status: Current
- Products: SOCATA - Groupe Aerospatiale GA-7
- Effective: March 9, 1979
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3424
- Registered aircraft: 44 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E42025AF1D7E961486256A38005EAA5D.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/79-05-07

## The airworthiness directive

79-05-07 GULFSTREAM AMERICAN (Formerly Grumman American Aviation Corporation): Amendment 39-3424. Applies to Model GA-7 airplanes, certificated in all categories, serial numbers GA7-0002 through GA7-0009, GA7-0011 through GA7-0057, and GA7-0059.

Compliance is required within the next 25 hours' time in service after the effective date of this AD, unless already accomplished.

To detect and prevent fuel leakage from cracks in the inboard fuel tank ribs at Wing Station (W.S.) 109, at the forward fuel tank outlet fittings in the left and right wings, accomplish the following:

  (a) Inspect, repair, and modify these aircraft in accordance with Gulfstream American Service Bulletin No. ME-9, dated November 13, 1978, and Supplement No. 1 dated December 18, 1978, or later revision approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region. In accomplishing the repair instructions of the service bulletin the additional defueling safety practices containedin GA-7 Maintenance Manual, Section 28-0, page 201, Fuel System-Maintenance Policies, must be observed.

  (b) Equivalent methods of compliance with this AD may be acceptable if approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region.

  (c) Airplanes may be flown in accordance with FAR 21.197 to a location where the needed inspection and repairs and fuel line replacement required by this AD may be accomplished.

This amendment becomes effective March 9, 1979.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A17SO](https://openairdocs.org/tcds/A17SO): Cougar Aircraft Corporation; names 1 of 1 models: GA-7

## 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: 44 (44 by airframe model, 0 by engine model)
- Makers: Grumman American Avn. 43, Gulfstream American 1

Models with the most aircraft:

- [Grumman American Avn. GA-7](https://openairdocs.org/model/grumman-american-avn-ga-7): 43 aircraft (airframe model)
- [Gulfstream American GA-7](https://openairdocs.org/model/gulfstream-american-ga-7): 1 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/79-05-07/models.md
Every aircraft: https://openairdocs.org/ad/79-05-07/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.