Commonwealth legislation

AD/AL 250/27 - Compressor Bleed Valve Strainer - Installation

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Commonwealth

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legislative instrument

Plain English Summary

2/10 complexity

This AD mandates installing a compressor bleed valve strainer on Allison 250-C20, -C20B, -B17 and -B17B turbine engines, to be done per the listed Allison service bulletins or FAA AD, within 100 hours TIS after 31 July 1977. It affects aircraft owners/operators, maintenance organisations and parts suppliers; owners bear compliance costs and must obtain and follow the referenced technical documents. The directive sets the mandatory requirement but delegates the technical/safety rationale to those referenced sources.

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AD/AL 250/27 - Compressor Bleed Valve Strainer - 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 250/27 Compressor Bleed Valve Strainer - Installation 7/77

Applicability: Model 250-C20, -C20B, -B17 and B17B. Document: 1. Allison CEB 250-C20/C20B-1116; or

2. Allison CEB 250-B17/B17B TP CEB 1071; or 3. FAA AD No. 77-09-08.

Compliance: Within 100 hours’ time in service after 31 July 1977.

Source text

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