Commonwealth legislation

AD/HU 369/84 - Tail Rotor Blades

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legislative instrument

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This Airworthiness Directive requires operators of McDonnell Douglas (Hughes) / Kawasaki 369‑series helicopters fitted with the listed tail‑rotor blade part and serial numbers to remove those specific blades from service before the next flight. The action responds to an in‑flight abrasion‑strip separation; removed blades must be returned to Rotor Blades (NZ) Ltd for rework, so operators bear the grounding, logistics and rework costs and must verify compliance.

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AD/HU 369/84 - Tail Rotor Blades

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 369/84 Tail Rotor Blades 1/92 DM

Applicability: Model 369 Series fitted with the following tail rotor blades: P/N 369D21613

S/Ns 0646, 1165,1821.

P/N 369D21613M S/Ns 1357, 1809, 1855. P/N 369D21613-11 S/Ns 2465, 2466, 2683. P/N 369D21613-51

S/Ns 4025, 4026, 4453, 4514, 4515, 4683, 02222-6097. P/N 369D21613-501

S/N 5308.

Requirement: Remove from service any tail rotor blade identified by the above serial number listing.

Note 1: Removed blades need to be returned to Rotor Blades (NZ) Ltd for rework. Note 2: Air Transport NZ AD DCA/HU 369/59 refers.

Compliance: Unless already accomplished; prior to further flight after 20 November 1991.

Background: This Directive is issued in response to a NZ AD which was issued as the result of a recent accident in New Zealand where a tail rotor blade abrasion strip separated in flight. Initial investigation has indicated a defect with the tail rotor blade abrasion strip attachment. The abrasion strips may appear free of bond separation or voids, but this does not assure their airworthiness. The above identified tail rotor blades are of the same batch as the accident blade.

Source text

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

1 AD/HU 369/84 - Tail Rotor Blades