Commonwealth legislation

AD/GA-7/9 - Rudder Torque Tube Corrosion and Cracking

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Commonwealth

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legislative instrument

Plain English Summary

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Owners and operators of all Gulfstream (Grumman American) GA‑7 series aeroplanes must carry out the inspection and repair actions specified in Gulfstream Service Bulletin No. ME‑21 within 10 hours TIS after 4 December 1985 and thereafter at intervals not exceeding 100 hours TIS or each Maintenance Release. The AD responds to reported corrosion and circumferential cracking of the rudder torque tube; it imposes recurring maintenance, downtime and direct costs to detect and correct that safety risk, with no alternative compliance routes specified.

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AD/GA-7/9 - Rudder Torque Tube Corrosion and Cracking

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Gulfstream (Grumman American) GA-7 Series Aeroplanes

AD/GA-7/9 Rudder Torque Tube Corrosion and Cracking 1/86 T

Applicability: All models.

Requirement: Action in accordance with Gulfstream Aerospace Corp, SB No ME-21.

Compliance: Within 10 hours time in service after 04 December 1985 and thereafter at intervals not exceeding 100 hours time in service or at each issue of a new Maintenance Release.

Background: The manufacturer reports instances of corrosion and cracking in the rudder torque tube at the bellcrank area. In two aircraft the torque tube had cracked around the entire circumference of the tube.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.