Commonwealth legislation

AD/HU 369/39 - Tail Rotor Control Bellcrank Supports - Inspection and Modification

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

2/10 complexity

This directive requires immediate and recurring inspections and eventual modification of the tail-rotor control bellcrank supports on McDonnell Douglas (Hughes) Model 500 (369-series) and specified Hughes Model 500D helicopters to prevent catastrophic tail-rotor failure. Owners/operators must inspect Station 142 within 25 flight hours after 17 July 1979 and every 100 hours thereafter until the Hughes modification (SIN HN-139 or DN-49) is installed. Cracks could cause loss of directional control and a crash.

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AD/HU 369/39 - Tail Rotor Control Bellcrank Supports - Inspection and Modification

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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 McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters

AD/HU 369/39 Tail Rotor Control Bellcrank Supports - Inspection and Modification

8/79

Applicability: All 500 model 369 series helicopters. All 500D model 369D with S/Nos. 0003D to 0531D, 0533D, 0535D and 0537D.

Document: 1. Hughes SIN No. HN-139 for Model 500;

Hughes SIN No. DN-49 for Model 500D.

Compliance: Inspection - Within 25 hours time in service after 17 July 1979 and thereafter at 100 hour intervals until modified to Part II of the relevant requirement document.

Background: Cracks may develop in the tail rotor control bellcrank supports at STN. 142.

Source text

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