Commonwealth legislation

AD/T53/12 - Fuel Regulator Main Pressure Regulator Valve Diaphragm 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This Act has been repealed and is no longer in force. It is retained for historical reference.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

2/10 complexity

What this does: This rule requires aircraft operators to replace faulty fuel regulator diaphragms in specific Lycoming turbine engines to prevent engine failure.

Who it affects: Owners and operators of aircraft fitted with T53 series engines (models T5307, 09, 11, 13 and T53-L-9, -11, -13) that contain fuel regulator diaphragms with part number 78958 manufactured between July 1973 and June 1974.

What you must do: Replace the affected diaphragms (identified by date codes 3Q73, 4Q73, 1Q74, and 2Q74) before 30 August 1974, following the procedures in Lycoming Alert Service Bulletin No. 0040 or AD/LYC-T/13.

Why it matters: The specified diaphragms were found to be defective and could fail, causing loss of engine power and potential aircraft accidents.

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AD/T53/12 - Fuel Regulator Main Pressure Regulator Valve Diaphragm Replacement

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source AlliedSignal (Lycoming) Turbine Engines - T53 Series

AD/T53/12 Fuel Regulator Main Pressure Regulator Valve

Diaphragm Replacement

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Applicability: All T5307, 09, 11, 13 Series and T53-L-9, -11, -13 Series engines fitted with fuel regulator main pressure regulator valve diaphragms P/N 78958 having a cure date of 1 July 1973 to 30 June 1974 (identified as 3Q73, 4Q73, 1Q74, 2Q74).

Document: 1. Lycoming Alert SB No. 0040; or

2. AD/LYC-T/13. Compliance: Before 30 August 1974.

Source text

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