Commonwealth legislation

AD/HU 369/85 Amdt 1 - Main Rotor Blade Root Replacement

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

4/10 complexity

This AD requires operators of McDonnell Douglas (Hughes) and Kawasaki 369D, 369E and 369F/FF helicopters with certain main rotor blades to replace the blade root fittings per the manufacturer’s service notices within 600 flight hours or by 30 September 1993. It’s issued to prevent catastrophic blade separation from undetected lug cracking.

JSON API

Deep dive

Want the full deep dive?

Zoe can write the in-depth analysis on top of the summary above: how it works, who it affects and what each part actually does.

Current sections

Direct links to the current provisions in AD/HU 369/85 Amdt 1 - Main Rotor Blade Root Replacement.

AD/HU 369/85 Amdt 1 - Main Rotor Blade Root Replacement

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters

AD/HU 369/85

Amdt 1

Main Rotor Blade Root Replacement 4/93

Applicability: All 369D, 369E, and 369F/FF series helicopters equipped with 369D21100-515 or 369D21102-501 Series main rotor blades.

Requirement: Action in accordance with MDHC SIN DN-183.2, EN-75.2 and FN62.2. Compliance: Part I: Deleted - compliance with AD/HU 369/41 Amdt. 7 fulfils this requirement.

Part II: Within 600 hours time in service after 04 October 1992 but not later than 30 September 1993.

Background: Undetected cracking of any of the main rotor blades root fittings lugs may lead to blade separation. At Amendment 1 the manufacturer has deleted the blade removal for inspection requirement, and removed the repetitive inspection to SBs DN-51.6, EN-42.4 and FN-31.4; (AD/HU 369/41 Amdt 7 refers).

Source text

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

1 AD/HU 369/85 Amdt 1 - Main Rotor Blade Root Replacement