# AD 89-18-08: Fuel Tank/Fuel System

- Type: Airworthiness directive
- Status: Current
- Products: True Flight Holdings AA-5, AA-5A, AA-5B and GA-7
- Effective: September 21, 1989
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-6307
- Registered aircraft: 1,772 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DCA089D17D5FBD8E862569AF00767BF2.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/89-18-08

## The airworthiness directive

89-18-08 GULFSTREAM AEROSPACE CORPORATION: Amendment 39-6307.

Applicability: Gulfstream Aerospace Models AA-5, AA-5A, AA-5B, and GA-7 (all serial numbers) airplanes certificated in any category.

Compliance: Required within the next 25 hours time-in-service after the effective date of this AD, unless already accomplished.

To preclude fuel tank/fuel system contamination caused by deterioration of fuel tank access cover sealant, accomplish the following:

  (a) Inspect the fuel tanks, fuel system, and the electric fuel pump filter for fuel tank sealant contamination in accordance with the instructions specified in Gulfstream Aerospace Corporation (GAC) Service Bulletin (SB) No. 176, dated July 26, 1989, or GAC S/B No. ME 22, dated July 26, 1989, as applicable. If contamination is detected, prior to further flight clean the fuel system and all fuel system components in accordance with the instructions in the above listed applicable GAC S/B.

  (b) Reseal the fuel tank access covers using high-octane fuel resistant sealant per the instructions in the applicable GAC S/B listed in paragraph (b) of this AD.

  (c) An equivalent means of compliance with this AD may be used if approved by the Manager, Atlanta Aircraft Certification Office, FAA, Small Airplane Directorate, Aircraft Certification Service, 1669 Phoenix Parkway, Suite 210C, Atlanta, Georgia 30349.

All persons affected by this directive may obtain copies of the documents referred to herein upon request to Gulfstream Aerospace Corporation, Technical Operations Department, Travis Field, P.O. Box 2206, Savannah, Georgia 31402-2206; or may examine the documents at the FAA, Office of the Assistant Chief Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106.

This amendment (39-6307, AD 89-18-08) becomes effective on September 21, 1989.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A16EA](https://openairdocs.org/tcds/A16EA): True Flight Holdings LLC; names 3 of 4 models: AA-5B, AA-5A, AA-5
- [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: 1,772 (1,772 by airframe model, 0 by engine model)
- Makers: Grumman American Avn. 1,329, Gulfstream American 316, American 127

Models with the most aircraft:

- [Grumman American Avn. AA-5B](https://openairdocs.org/model/grumman-american-avn-aa-5b): 643 aircraft (airframe model)
- [Grumman American Avn. AA-5A](https://openairdocs.org/model/grumman-american-avn-aa-5a): 386 aircraft (airframe model)
- [Grumman American Avn. AA-5](https://openairdocs.org/model/grumman-american-avn-aa-5): 257 aircraft (airframe model)
- [Gulfstream American AA-5B](https://openairdocs.org/model/gulfstream-american-aa-5b): 216 aircraft (airframe model)
- [American AA-5](https://openairdocs.org/model/american-aa-5): 127 aircraft (airframe model)
- [Gulfstream American AA-5A](https://openairdocs.org/model/gulfstream-american-aa-5a): 99 aircraft (airframe model)
- [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 8 models: https://openairdocs.org/ad/89-18-08/models.md
Every aircraft: https://openairdocs.org/ad/89-18-08/aircraft.md

Its text cites no advisory circulars or STCs.

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