Commonwealth legislation

AD/TFE 731/16 - HP Turbine Rotor Disc P/N 3072316-2/-3 and P/N 3073110-1/-2

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This directive requires operators of certain TFE731-3 engines to remove specific high‑pressure turbine rotor discs (only those serial‑numbered in the Requirement Document) from service and inspect them per AlliedSignal Service Bulletin TFE 731‑A72‑3388. It was issued after an inflight shutdown caused by a disc fracture from a foreign‑material inclusion; the goal is to detect and fix similarly affected discs before failure. Operators bear inspection, repair/replacement costs, downtime, and must meet the 150‑cycle compliance deadline.

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Current sections

Direct links to the current provisions in AD/TFE 731/16 - HP Turbine Rotor Disc P/N 3072316-2/-3 and P/N 3073110-1/-2.

AD/TFE 731/16 - HP Turbine Rotor Disc P/N 3072316-2/-3 and P/N 3073110-1/-2

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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AlliedSignal (Garrett/AiResearch) Turbine Engines - TFE731 Series

AD/TFE731/16 HP Turbine Rotor Disc P/N 3072316-2/-3

and P/N 3073110-1/-2

5/89 DM

Applicability: TFE 731-3 series engines fitted with HP turbine rotor disc whose serial numbers are listed in the Requirement Document.

Requirement: Remove from service and inspect specific serial numbered HP turbine rotor disc P/N 3072316-2/-3 and P/N 3073110-1/-2 in accordance with Allied Signal Aerospace (Garrett) Service Bulletin TFE 731-A72-3388.

Compliance: Prior to achieving 150 operating cycles after 29 March 1989.

Background: A recent engine inflight shutdown was caused by the uncontained separation of an HP turbine rotor disc. Investigation determined that disc fracture occurred due to low cycle fatigue from an inclusion of foreign material within the disc.

This Directive is issued to remove from service and inspect suspect HP turbine discs.

Source text

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

1 AD/TFE 731/16 - HP Turbine Rotor Disc P/N 3072316-2/-3 and P/N 3073110-1/-2