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