Commonwealth legislation

AD/PT6T/4 - Fuel Control Bypass Valve Diaphragm

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legislative instrument

Plain English Summary

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This AD mandates owners/operators of Pratt & Whitney PT6T-3 and PT6T-6 engines fitted with the listed Aviation Electric Fuel Control unit part numbers to inspect/repair the fuel-control bypass valve diaphragm by following one of three referenced documents (P&W ASB No.5153, FAA AD 78-17-05, or AD/UAC‑T/30). Work must be done within 50 hours TIS after 30 Nov 1978. Compliance (and its cost) is the operator’s responsibility; the referenced documents set the specific maintenance steps.

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AD/PT6T/4 - Fuel Control Bypass Valve Diaphragm

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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 - PT6T Series

AD/PT6T/4 Fuel Control Bypass Valve Diaphragm 10/85

Applicability: PT6T-3 and PT6T-6 engines fitted with Aviation Electric Fuel Control Units P/N 2524381-5, 3244712-1 and -2, 3244717-1 thru -5, 3244721-1 thru -5, 3244735-1 thru

-7, and 3244737-1 thru -7.

Document: 1. Pratt & Whitney Aircraft of Canada Alert SB No. 5153; or 2. FAA AD 78-17-05, Amendment 39-3285; or

AD/UAC-T/30.

Compliance: Within the next 50 hours time in service after 30 November 1978.

Source text

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