Commonwealth legislation

AD/AL 250/31 - Fuel System - Check Valve Assembly - Installation

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

1/10 complexity

This Airworthiness Directive mandates that owners/operators of specified Allison 250-series turbine engines (certain 250‑C20, 250‑C20B, 250‑B17 and 250‑B17B serial ranges) install a fuel system check‑valve per the Allison service bulletins to prevent leaks, engine stoppage or fire. It is legally binding and affected aircraft may not fly until the modification was completed (deadline: 30 Nov 1978).

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AD/AL 250/31 - Fuel System - Check Valve Assembly - Installation

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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 Allison Turbine Engines - 250 Series

AD/AL 250/31 Fuel System - Check Valve Assembly - Installation

Applicability: 250-C20 Engine Assemblies prior to S/N CAE 823424. 250-C20B Engine

5/78

Assemblies prior to S/N CAE 830490. 250-B17 Engine Assemblies prior to S/N CAE 870060. 250-B17B Engine Assemblies prior to S/N CAE 880190.

Document: 1. Allison 250-C20B CEB 1101R1; or

2. Allison 250-B17/B17B TP CEB 1078R1.

Compliance: Before 30 November 1978.

Source text

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