Commonwealth legislation

AD/JT9D/9 - Fifth Stage Turbine Hubs - Reduction of Cyclic Life

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

The AD reduces the allowable cyclic life for certain fifth-stage turbine hubs on Pratt & Whitney JT9D engines and makes compliance mandatory by reference to an external Requirement Document (FAA AD 77‑01‑07 or AD/PW‑T/41). It affects aircraft operators, engine owners, maintenance organisations and parts suppliers servicing the listed hubs.

Practically, hubs must be inspected/overhauled or replaced sooner, increasing maintenance, parts demand, costs and potential aircraft downtime.

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AD/JT9D/9 - Fifth Stage Turbine Hubs - Reduction of Cyclic Life

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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 Turbine Engines - JT9D Series

AD/JT9D/9 Fifth Stage Turbine Hubs - Reduction of Cyclic Life 4/77

Applicability: JT9D-3A, -7, -7A, -7H, -7AH, -7F and -30 engines containing fifth stage turbine hubs P/N 704705, 714905, 718905, 719205 and 726805.

Document: 1. FAA AD 77-01-07 : Amendment 39-2807; or

AD/PW-T/41.

Compliance: As per the Requirement Document.

Source text

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