Commonwealth legislation

AD/HU 269/17 - Tail Rotor Transmission Housing - 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This Act has been repealed and is no longer in force. It is retained for historical reference.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

1/10 complexity

What this does: This is a mandatory safety inspection rule for specific helicopters. It requires operators to check for cracks in the tail rotor transmission housing using a magnifying glass.

Who it affects: Owners and operators of Schweizer (Hughes) 269A and 269B helicopters that have been fitted with modification kit M10011 (which installs a low tip speed tail rotor).

What must be done: After removing the horizontal stabiliser (the small wing at the tail), the operator must inspect the tail rotor transmission assembly housing for cracks starting from the stabiliser attachment bolt holes. This inspection must be performed using a 10X magnifying glass (similar to a jeweller's loupe).

Why it matters: Cracks in this housing could lead to tail rotor failure and potential loss of control of the aircraft. This directive ensures critical structural components are checked for fatigue or damage before they become dangerous.

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AD/HU 269/17 - Tail Rotor Transmission Housing - 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 Schweizer (Hughes) 269 Series Helicopters

AD/HU 269/17 Tail Rotor Transmission Housing - Inspection 11/67

Applicability: Models 269A and 269B fitted with mod. kit M10011. (Installation of low tip speed tail rotor).

Requirement: After removal of the horizontal stabiliser, inspect the tail rotor transmission assembly housing for cracks originating from the stabiliser attachment bolt holes using a 10X glass.

Compliance: As detailed in the requirement document.

Source text

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