Commonwealth legislation

AD/PW100/6 Amdt 2 - Intercompressor Case Ventilation

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

What it does: Requires operators of specified Pratt & Whitney Canada PW100-series engines to carry out the technical modifications and procedures set out in Transport Canada Airworthiness Directive CF-92-03R2 to ventilate the intercompressor case and prevent ignition of accumulated oil or air/oil mist.

Who pays and why it matters: Aircraft operators and maintenance organisations must implement the changes at their cost under this AD because ICC fires have been reported and can cause engine damage and in‑flight shutdowns.

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Current sections

Direct links to the current provisions in AD/PW100/6 Amdt 2 - Intercompressor Case Ventilation.

AD/PW100/6 Amdt 2 - Intercompressor Case Ventilation

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Pratt and Whitney Canada Turbine Engines - PW100 Series

AD/PW100/6

Amdt 2

Intercompressor Case Ventilation 10/97

Applicability: PW118A, PW123, PW123AF, PW123B, PW124B, PW125B, PW126, PW126A

engines.

Requirement: Action in accordance with the technical requirements of Transport Canada Airworthiness Directive CF-92-03R2.

Note: FAA AD 94-11-11 also refers.

Compliance: Unless previously accomplished, as detailed in the requirement document.

This amendment becomes effective on 11 September 1997.

Background: This AD arises from reports of internal oil fires in the intercompressor case (ICC) which can result in aircraft damage and in-flight shutdown.

ICC fires can occur as a result of spontaneous ignition of:

(a) engine oil that has accumulated in the ICC cavity, or

(b) air/oil mist that can reverse flow into the ICC following a No 5 bearing failure. The modifications mandated by this AD will prevent ICC fires.

Amendment 1 revised the Directive to reflect the technical requirements of Transport Canada AD CF-92-03 R2 and to expand the "Background" information.

This amendment corrects the reference to FAA AD 94-11-11.

Amendment 1 of this airworthiness directive became effective on 10 November 1994. The original issue of this airworthiness directive became effective on 10 March 1993.

Source text

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

1 AD/PW100/6 Amdt 2 - Intercompressor Case Ventilation