Commonwealth legislation

AD/HU 369/73 - Tail Rotor Fork Bolt

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

3/10 complexity

Operators of McDonnell Douglas (Hughes) and Kawasaki 369-series helicopters with tail rotor fork bolt P/N 369A 1602 must perform urgent maintenance per the manufacturer’s service instructions and inspect spare-bolt inventory before installation. The directive imposes near-term inspection and replacement deadlines to address bolts that may lack proper treatment and can crack. Failure of a tail rotor fork bolt risks loss of tail rotor function and potential loss of control.

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Current sections

Direct links to the current provisions in AD/HU 369/73 - Tail Rotor Fork Bolt.

AD/HU 369/73 - Tail Rotor Fork Bolt

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters

AD/HU 369/73 Tail Rotor Fork Bolt 3/88 DM

Applicability: All model 369 series helicopters with P/N 369A 1602 tail rotor fork bolts installed. Requirement: Action in accordance with McDonnell Douglas SIN No. HN-212, DN-153, EN-43,

FN-32, as applicable.

Compliance: a. For Part I of Requirement document; within 25 hours time in service after 31 January 1988.

b. For Part II of Requirement document; at the next 300 hour or annual inspection, or at the next disassembly of the tail rotor assembly; whichever occurs first.

c. For Part I of Requirement document; all tail rotor fork bolts and tail rotor assemblies in spares inventories prior to being installed on helicopters.

Background: MDHC has determined that a possibility exists that some P/N 369A 1602 tail rotor fork bolts did not receive proper processing at the manufacturer. Inadequate processing of these bolts can result in cracking and eventual bolt failure.

Source text

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

1 AD/HU 369/73 - Tail Rotor Fork Bolt