Commonwealth legislation

AD/HU 369/6 - NAS 1291 - 4 Nuts Used in Specific Applications 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This Act has been repealed and is no longer in force. It is retained for historical reference.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

2/10 complexity

What it is: This is an Airworthiness Directive (AD) — a legally binding safety order issued under the Civil Aviation Regulations requiring specific maintenance action on aircraft.

What it requires: Owners and operators must inspect specific nuts (identified as NAS 1291 - 4) used in critical applications on their helicopters. The exact details of which aircraft and which nuts are covered appear in a separate technical document called Hughes Service Information Notice HN-4.

Who it affects: Operators of McDonnell Douglas (Hughes) and Kawasaki 369 series helicopters with specific serial numbers listed in the referenced notice.

The deadline: The inspection had to be completed before 1 September 1971.

Why it matters: This directive addresses potential safety risks with specific fasteners in critical applications, ensuring they are inspected to prevent mechanical failures that could compromise flight safety.

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Direct links to the current provisions in AD/HU 369/6 - NAS 1291 - 4 Nuts Used in Specific Applications Inspection.

AD/HU 369/6 - NAS 1291 - 4 Nuts Used in Specific Applications 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 McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters

AD/HU 369/6 NAS 1291 - 4 Nuts Used in Specific Applications Inspection

Applicability: All models with S/Nos. as specified in Hughes SIN HN-4. Document: Hughes SIN No. HN-4.

Compliance: Before 1 September 1971.

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Source text

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