Commonwealth legislation

AD/AMD 20/24 - Engine Cowl Attachment

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This Act has been repealed and is no longer in force. It is retained for historical reference.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 for aircraft operators. It requires owners of specific French-made business jets (the Mystere-Falcon 200 series) to inspect and repair the engine covers (cowls).

Why it matters: Cracks have been discovered in the metal brackets that hold the engine cowls in place. These cracks are caused by metal fatigue (wear and tear from repeated stress). If not fixed, the engine covers could fall off during flight, creating serious hazards.

What must be done: Aircraft mechanics must follow specific French aviation safety guidelines (technical document DGAC AD 91-197-018(B)) to inspect the attachment points and carry out any necessary modifications.

Deadline: While the original French directive took effect in September 1991, Australian-registered aircraft were given until 12 December 1991 to complete the work—a two-month extension to allow time for scheduling maintenance.

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AD/AMD 20/24 - Engine Cowl Attachment

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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 AMD Fan Jet Falcon (Falcon 20/Mystere-Falcon 200) Series Aeroplanes

AD/AMD 20/24 Engine Cowl Attachment 12/91

Applicability: Mystere-Falcon 200 all serial numbers.

Requirement: Inspect and modify the engine cowl attachments in accordance with the technical requirements of DGAC AD 91-197-018(B).

Compliance: As specified in the Requirement Document with a revised effective date of 12 December 1991 for Australian registered aircraft.

Background: Instances of fatigue cracking have been reported in the engine cowl attachments. These defects could ultimately lead to in-flight loss of the small aprons and hinged cowls. The effective date of the DGAC AD is September 1991. This Directive permits compliance to be deferred two months.

Source text

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