Commonwealth legislation

AD/T53/16 - Power Turbine Clamping Plate - Inspection

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

3/10 complexity

What this does: This is a mandatory safety instruction (called an Airworthiness Directive) requiring inspections of power turbine clamping plates on specific Lycoming T53 aircraft engines.

Who it affects:

Operators of aircraft fitted with T5313A, T5313B, T53-L-13A or T53-L-13B engines (commonly used in helicopters like the Bell UH-1 Iroquois)
Anyone holding spare clamping plates part number 1-140-144-2
Owners of specific power turbine rotor assemblies listed by serial number in Lycoming Service Bulletin No. 0041

What must be done: Aircraft owners must inspect the clamping plates according to the procedures in Lycoming Service Bulletin No. 0041 (paragraphs 1Da and 1Db). This is to detect cracks or defects that could cause the power turbine to fail in flight.

Why it matters: A failed clamping plate can cause catastrophic engine failure. This rule makes the inspection legally mandatory rather than just a manufacturer recommendation.

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AD/T53/16 - Power Turbine Clamping Plate - Inspection

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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/T53/16 Power Turbine Clamping Plate - Inspection 1/86

Applicability: All T5313A, T5313B, T53-L-13A and T53-L-13B Series engines, and power turbine rotor assemblies listed by S/No. in Lycoming SB No. 0041; and all spare clamping plates P/N 1-140-144-2.

Document: 1. Lycoming SB No. 0041; or

2. AD/LYC-T/17.

Compliance: As per paragraph 1Da and 1Db of Lycoming SB 0041.

Source text

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