Commonwealth legislation

AD/HU 269/23 Amdt 8 - Main Rotor Gear Drive Assembly - Inspection and Replacement

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

Mechanically, this directive shortens the allowed service life for certain main rotor drive shafts and couplings and makes installation of a revised carrier assembly mandatory. It applies to Schweizer (Hughes) 269-series helicopters fitted with the specified gear-drive and drive-shaft part numbers and requires operators to inspect and replace those parts in accordance with Hughes SIN N-179, changing maintenance intervals and replacement obligations.

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AD/HU 269/23 Amdt 8 - Main Rotor Gear Drive Assembly - Inspection and Replacement

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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 269/23

Amdt 8

Main Rotor Gear Drive Assembly - Inspection and Replacement

11/81

Applicability: All models fitted with P/N 269A5175, 269A5175-3 or 269A5175-5 main rotor gear drive, incorporating P/N 269A5179 or 269A5179-3 drive shaft.

Document: Hughes SIN N-179.

Note: FAA AD 81-17-04 refers.

Compliance: In accordance with the requirement document.

Background: The Directive is raised in issue to reflect current manufacturers data and FAA requirements. Hughes SIN N-179 supersedes N-114-3 N-143, and additionally reduces the life of P/N 269A5179 or 269A5179-3 shaft and coupling assemblies. Installation of P/N 269A5194 carrier assembly(N-142-1) is now mandatory.

Source text

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