Commonwealth legislation

AD/AC/71 - Aft Engine Mount Attachment - Inspection

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

1/10 complexity

What this requires:

Owners and operators of specific Twin Commander 690B aircraft (serial numbers 11535 to 11566) must inspect the rear engine mount attachment within 100 flight hours after 31 October 1980.

Why it matters:

The manufacturer (Rockwell International) identified that the aft engine mount fitting might not be properly attached to the firewall during manufacturing. A loose engine mount could cause the engine to shift or detach in flight, creating a serious safety risk.

What you need to do:

Follow the inspection procedures outlined in Rockwell International Service Bulletin No. 173 to check that the engine mount is properly secured.

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Current sections

Direct links to the current provisions in AD/AC/71 - Aft Engine Mount Attachment - Inspection.

AD/AC/71 - Aft Engine Mount Attachment - Inspection

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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/71 Aft Engine Mount Attachment - Inspection 10/80

Applicability: All models 690B with S/Nos. 11535 to 11566. Document: Rockwell International SB No. 173.

Compliance: Within 100 hours’ time in service after 31 October 1980.

Background: The manufacturer advises that the aft engine mount fitting may not be properly mounted to the firewall.

Source text

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