Commonwealth legislation

AD/AL 250/13 - Improved Indicating Magnetic Drain Plugs - Introduction

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

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Commonwealth

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legislative instrument

Plain English Summary

2/10 complexity

What this does: This airworthiness directive mandates the installation of improved magnetic drain plugs on specific Allison turbine engines used in aircraft.

Who it affects: Aircraft operators and owners with Allison 250-C18 or 250-C18A engines bearing these specific serial numbers:

250-C18: S/Nos. 800001 to 800165 and CAE 800266 to 801575 (Approx.)
250-C18A: S/Nos. CAE 800166 to 800265, 801600 to 801799, and 801900 to 801950 (Approx.)

Why it matters: Magnetic drain plugs trap metal particles in engine oil, acting as an early warning system for internal engine damage. The improved design provides better detection of metal debris, helping prevent catastrophic engine failure and maintaining airworthiness.

Requirements: You must install the improved drain plugs within 100 hours of engine operation after 30 October 1970, following the technical instructions in Allison 250 CEB No. 109 (the manufacturer's service bulletin).

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AD/AL 250/13 - Improved Indicating Magnetic Drain Plugs - Introduction

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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 250/13 Improved Indicating Magnetic Drain Plugs - Introduction

10/70

Applicability: All 250-C18 engines with S/Nos. 800001 to 800165 and CAE 800266 to 801575 (Approx.) and All 250-C18A series with S/Nos. CAE 800166 to 800265, 801600 to 801799, and 801900 to 801950 (Approx.).

Document: Allison 250 CEB No. 109.

Compliance: Within 100 hours’ time in service after 30 October 1970.

Source text

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