Commonwealth legislation

AD/PT6A/14 - Sungear Coupling Shaft Retaining Rings

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This Act has been repealed and is no longer in force. It is retained for historical reference.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 Airworthiness Directive (a legally binding aviation safety rule) mandates specific maintenance actions for certain Pratt & Whitney Canada PT6A aircraft engines. It requires compliance with technical service bulletins regarding sungear coupling shaft retaining rings — small mechanical components that secure parts on the engine's sun gear shaft.

Who it affects: Owners and operators of aircraft with PT6A-6, -6A, -6B, -20, -27, -28, or -34 model engines, specifically those with serial numbers listed in the referenced technical documents.

What must be done: Operators must follow the instructions in United Aircraft of Canada Limited (UACL) Service Bulletin No. 249, No. 1173, or Airworthiness Directive AD/UAC-T/12 (whichever applies to their specific engine).

When: Before installing the engine in an aircraft following its next reconditioning (overhaul) after 31 October 1972, or the next time the affected area becomes accessible during maintenance — whichever happens first.

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AD/PT6A/14 - Sungear Coupling Shaft Retaining Rings

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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 Pratt and Whitney Canada Turbine Engines - PT6A Series

AD/PT6A/14 Sungear Coupling Shaft Retaining Rings 10/85

Applicability: All PT6A-6, -6A, -6B, -20, -27, -28 and -34 with S/Nos. as listed in the requirement document.

Document: 1. UACL SB No. 249;

2. UACL SB No. 1173, or

3. AD/UAC-T/12.

Compliance: Before installation in an aircraft following next reconditioning completed after 31 October 1972 or next time the affected area becomes accessible whichever occurs first.

Source text

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