# AD 85-26-05: Rudder Torque Tube

- Type: Airworthiness directive
- Status: Current
- Products: SOCATA - Groupe Aerospatiale GA-7
- Effective: January 3, 1986
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-5203
- Registered aircraft: 44 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/08FDFEAF8D032438862569AF00767B20.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/85-26-05

## The airworthiness directive

85-26-05 GULFSTREAM AEROSPACE: Amendment 39-5203. Applies to Model GA-7 (Cougar) airplanes, all serial numbers, certified in any category.

COMPLIANCE: Required within 50 hours time-in-service after the effective date of this AD unless previously accomplished.

To prevent failure of the rudder torque tube, accomplish Paragraphs (a), (b) and (c) of the following AD in accordance with Gulfstream Aerospace Corporation (GAC) Service Bulletin (S/B) No. ME-21, dated November 1, 1985:

  (a) Visually inspect the rudder torque tube for corrosion or cracks.

  (b) If any cracks or excessive corrosion is found, prior to further flight replace the rudder torque tube, P/N 7CS10500-11.

  (c) If no cracks are found and no corrosion or only light surface corrosion exists on the rudder torque tube, prior to further flight apply corrosion protection treatment to the torque tube.

  (d) Aircraft may be flown in accordance with Federal Aviation Regulation 21.197 to a location wherethis AD can be accomplished.

  (e) An equivalent method of compliance with this AD, if used, must be approved by the Manager, Atlanta Aircraft Certification Office, 1075 Inner Loop Road, College Park, Georgia 30337; telephone (404) 763-7428.

All persons affected by this directive may obtain copies of the documents referred to herein upon request to Gulfstream Aerospace Corporation, P.0. Box 2206, Savannah, Georgia 31402- 2206, or the FAA, Rules Docket, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106.

This amendment becomes effective on January 3, 1986.

## 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/85-26-05/models.md
Every aircraft: https://openairdocs.org/ad/85-26-05/aircraft.md

Its text cites no advisory circulars or STCs.

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