Commonwealth legislation

AD/S-76/47 - Engine and Engine Compartment Drain Lines

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This Act has been repealed and is no longer in force. It is retained for historical reference.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 is a safety directive (called an Airworthiness Directive) issued to prevent mechanical failures in helicopters.

What it does:

Requires owners and operators of Sikorsky S-76A helicopters to inspect specific drain lines located in the engine and engine compartment
The inspection must follow the exact procedure outlined in the manufacturer's technical notice: Sikorsky Alert Service Bulletin No. 76-71-9 (a formal safety alert issued by the helicopter maker)
Must be completed within 100 hours of flying time after 31 August 1987

Why it matters: The combustion chamber and exhaust casing drain lines were found to develop cracks after extended use. These cracks could potentially cause dangerous failures, so this directive mandates proactive checks to catch damage before it creates a safety risk.

Who is affected: Anyone operating an S-76A helicopter in Australia must comply with this inspection requirement.

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AD/S-76/47 - Engine and Engine Compartment Drain Lines

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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 Sikorsky S-76 Series Helicopters

AD/S-76/47 Engine and Engine Compartment Drain Lines 9/87

Applicability: All model S76A helicopters.

Requirement: Action in accordance with Sikorsky Alert Service Bulletin No. 76-71-9. Compliance: Within 100 hours time in service after 31 August 1987, inspect in accordance with

Section 2 Para A of Requirement document.

Background: Some sections of the combustion chamber and exhaust casing lower drain lines have cracked after extended periods of service.

Source text

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