Commonwealth legislation

AD/AC/73 - Wing Fasteners - Modification

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This is a safety order (called an Airworthiness Directive) issued by Australia's aviation safety regulator (CASA).

What it does: It requires owners or operators of specific Twin Commander aircraft models to upgrade the bolts or screws ("fasteners") where the wing meets the engine housing.

Who it affects: Owners of Twin Commander 690, 690A, and 690B aircraft with serial numbers between 11001 and 11566 (but not 11006).

What must be done: Follow the technical instructions in Gulfstream American Service Bulletin No. 182 to install stronger fasteners in the engine nacelle area.

Why it matters: The original fasteners weren't strong enough, which could create a safety risk. This modification prevents potential structural failures.

Deadline: The work must be completed within 100 flight hours after 31 July 1981.

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Current sections

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AD/AC/73 - Wing Fasteners - Modification

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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 Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes

AD/AC/73 Wing Fasteners - Modification 7/81

Applicability: All models 690, 690A and 690B with S/Nos. 11001 to 11566 (except 11006). Document: Gulfstream American (Commander Division) SB No. 182.

Compliance: Within 100 hours time in service after 31 July 1981.

Background: Modification is required for increased fastener strength in the engine nacelle area.

Source text

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