Commonwealth legislation

AD/APU/7 - High Pressure Turbine Disc

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This Directive requires owners/operators of specified Garrett TSCP700-4B and TSCP700-5 APUs (serials before stated cutoffs) to carry out the technical actions in FAA AD 91-25-04—as referenced—within 24 months. It was issued because of reported high‑pressure turbine disc ruptures; it creates a binding compliance obligation that affects maintenance scheduling, downtime and repair choices.

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AD/APU/7 - High Pressure Turbine Disc

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Auxiliary Power Units

AD/APU/7 High Pressure Turbine Disc 4/92

Applicability: Garrett Auxiliary Power Division model TSCP700-4B auxiliary power units, prior to S/N 90697 and model TSCP700-5 auxiliary power units prior to S/N 80443.

Requirement: Action in accordance with the technical requirements of FAA AD 91-25-04.

Note: Garrett Service Bulletin TSCP700-49-5892 Revision 2 dated 10 October 1990, refers.

Compliance: Within 24 months after the issue date of this Directive.

Background: This Directive has been raised due to reports of HPT disc ruptures. This condition, if not corrected, could lead to an uncontained HPT disc failure.

Source text

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