# AD 79-05-06: Chafing and Leakage of Main Fuel Line

- 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- Superseded by: Nothing supersedes this AD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: 39-3423
- Registered aircraft: 44 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BFDA9856AC83A99486256A38005EA934.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/79-05-06

## The airworthiness directive

79-05-06 GULFSTREAM AMERICAN (Formerly Grumman American Aviation Corporation): Amendment 39-3423. Applies to Model GA-7 airplanes, certificated in all categories, serial numbers GA-7-0001 through GA-7-0076.

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

To prevent chafing, and possible leakage, of the main fuel feed line by the propeller control cable behind the firewall in the left hand engine nacelle, accomplish the following:

  (a) Within the next 25 hours' time in service, after the effective date of this AD, determine the clearance between the main fuel line and the propeller control cable in accordance with Gulfstream American Service Bulletin ME-14, dated December 23, 1978, or later revision approved by the Chief, Engineering and Manufacturing Branch, FAA Southern Region.

  (b) If the clearance measured is less than one-half inch, replace the fuel line before further flight.(c) If the clearance measured is one-half inch or greater, replace the fuel line not later than 100 hours' time in service after the effective date of this AD.

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

  (e) Airplanes may be flown in accordance with FAR 21.197 to a location where the needed inspection and work required by this AD can 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/79-05-06/models.md
Every aircraft: https://openairdocs.org/ad/79-05-06/aircraft.md

Its text cites no advisory circulars or STCs.

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