Commonwealth legislation

AD/S-76/55 Amdt 1 - Retention Bolt for Stationary Swashplate Expandable Pin

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This Act has been repealed and is no longer in force. It is retained for historical reference.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 mandates a safety fix for specific Sikorsky S-76 helicopters to prevent a critical flight control component from coming loose.

Who it affects: Owners and operators of S-76A and S-76B helicopters with serial numbers up to and including 760356 and 760367.

What you must do: Install a nut and bolt assembly in the stationary swashplate (a rotating part that helps control the helicopter's blades) according to the manufacturer's Alert Service Bulletin No 76-67-38. This prevents the expandable pin from slipping out of position, which could affect flight safety.

When: Before the aircraft can be issued with an Australian Certificate of Airworthiness (C of A) — the legal document proving an aircraft is safe to fly.

What's new: This update expands the list of affected aircraft by adding more serial numbers and changes when the work must be completed compared to the original version.

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AD/S-76/55 Amdt 1 - Retention Bolt for Stationary Swashplate Expandable Pin

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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-76/55

Amdt 1

Retention Bolt for Stationary Swashplate Expandable Pin

5/90

Applicability: All model S-76A and S-76B series prior to and including SS No 760356 and 760367. Requirement: Action in accordance with Sikorsky Alert Service Bulletin No 76-67-38.

Compliance: Before issue of an Australian C of A.

Background: The manufacturer now requires the installation of a nut and bolt assembly in the stationary swashplate. This will ensure the expandable pin assembly does not migrate from its location.

Amendment 1 adds aircraft S/N and changes the compliance Requirement.

Source text

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