Commonwealth legislation

AD/AL 250/21 - Ceco F.C.U. Throttle Shaft and Governor Quadrant and Shaft Assembly - Inspection

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This Act has been repealed and is no longer in force. It is retained for historical reference.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 is: An Airworthiness Directive — a mandatory safety order issued by the aviation regulator requiring specific maintenance actions on aircraft engines.

Who it affects: Owners and operators of Allison 250-C20 series turbine engines fitted with:

Ceco Fuel Control Unit (FCU) assemblies with serial numbers earlier than 3AAC2088
Power turbine governor assemblies with serial numbers earlier than 3AAD2364 and 3ACK175

What must be done: Inspect the throttle shaft on the Ceco FCU and the quadrant and shaft assembly on the power turbine governor. The inspection must follow the procedures in Allison Service Bulletin CEB No. 1033.

When: Within 100 hours of flight time (time in service) after 29 March 1974.

Why it matters: This prevents potential engine failures or loss of power control due to defects in these specific components. Operating an aircraft without completing this inspection violates aviation safety law.

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AD/AL 250/21 - Ceco F.C.U. Throttle Shaft and Governor Quadrant and Shaft Assembly - 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 Allison Turbine Engines - 250 Series

AD/AL 250/21 Ceco F.C.U. Throttle Shaft and Governor

Quadrant and Shaft Assembly - Inspection

3/74

Applicability: All 250-C20 series engines fitted with Ceco FCU assemblies prior to S/N 3AAC2088 and with power turbine governor assemblies prior to S/Nos. 3AAD2364 and 3ACK175.

Document: Allison 250-C20 CEB No. 1033.

Compliance: Within 100 hours’ time in service after 29 March 1974.

Source text

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