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AD/PW4000/17 - Turbine Exhaust Case
Pratt and Whitney Turbine Engines - PW40Pratt and Whitney Turbine Engines - PW4000 Series
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Pratt and Whitney Turbine Engines - PW4000 Series
| AD/PW4000/17 | Turbine Exhaust Case | 19/2010 |
|---|
| Applicability: | Pratt and Whitney PW4000 engines as specified by models in FAA AD 2003-26-09. |
|---|---|
| Requirement: | Unless already accomplished perform the initial inspections in accordance with the technical requirements of FAA AD 2003-26-09.Repeat the inspections in accordance with the technical requirements of FAA AD 2003-26-09.Later revisions to PW ASB PW4G-112-A72-257, Revision 1, dated 22 August 2003, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2003-26-09, are considered acceptable for compliance with the equivalent Requirements of this AD. |
| Compliance: | As specified in the Requirement Document with a revised effective date of20 September 2010. |
| This Airworthiness Directive becomes effective on 20 September 2010. | |
| Background: | There have been of reports of engine high pressure turbine (HPT) assembly hardware being damaged as a result of thermal distress from oil igniting after leaking from the No. 3 bearing compartment. This AD is issued to prevent thermal distressed HPT assembly hardware from remaining in service, which could result in a cracked HPT stage 1 disc and HPT stage 1-2 air seal and an uncontained engine failure.CASA appreciates that although this AD may not be applicable to any aircraft presently registered in Australia, it will ensure applicability for aircraft entering the Australian register in the future with this engine configuration. |
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Charles Lenarcic
Delegate of the Civil Aviation Safety Authority
9 September 2010