Commonwealth legislation

AD/B-2/9 - Main Transmission Mount - Reinforcement

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This Act has been repealed and is no longer in force. It is retained for historical reference.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 this is: An Airworthiness Directive (AD) — a mandatory safety order issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.

What it requires: Owners of specific Brantly B-2 helicopters (serial numbers 4, 5, 7–12, and 14–18) must immediately reinforce the main transmission mount. The work must follow the manufacturer's Service Letter No. 5.

Why it matters: The main transmission mount attaches the helicopter's gearbox to the airframe. A failure here could cause the rotor system to separate from the aircraft. This directive fixes a known structural weakness in early production models to prevent catastrophic accidents.

Who must comply: Anyone operating the listed helicopter serial numbers. The directive takes effect immediately ("forthwith") — there is no grace period.

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Direct links to the current provisions in AD/B-2/9 - Main Transmission Mount - Reinforcement.

AD/B-2/9 - Main Transmission Mount - Reinforcement

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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 Brantly B-2 Series Helicopters

AD/B-2/9 Main Transmission Mount - Reinforcement 12/60

Applicability: Model B-2 with S/Nos. 4, 5, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17 and 18. Document: Brantly SL No. 5.

Compliance: Forthwith.

Source text

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