Airworthiness directives › 2007-26-20
AD 2007-26-20 Airworthiness Directives; Pratt & Whitney (PW) PW4164, PW4168, and PW4168A Turbofan Engines
Applicability*9
This AD applies to Pratt & Whitney PW4164, PW4168, and PW4168A turbofan engines with certain low pressure turbine (LPT) stage 4 disks, part number (P/N) 51N404, that have a serial number (S/N) listed in the following Table 1, installed. These engines are installed on, but not limited to, Airbus A330-200 and A330-300 series airplanes. Table 1.—Affected LPT Stage 4 Disks by Serial Number LPT Stage 4 Disk Serial Nos. CLDLC01142 CLDLC01143 CLDLC01144 CLDLC01145 CLDLC01146 CLDLC01148 CLDLC01149 CLDLC01150 CLDLC01151 CLDLC01152 CLDLC01181 CLDLC01182 CLDLC01183 CLDLC01185 CLDLC01186 CLDLC01187
Compliance
You are responsible for having the actions required by this AD performed at the next piece-part exposure after the effective date of this AD or within 7,500 cycles-since-new, unless the actions have already been done. Removing the LPT Stage 4 Disk (f) Remove from service any LPT stage 4 disk that has an S/N listed in Table 1 of this AD. Prohibition Against Installing an Affected Disk (g) After the effective date of this AD, do not install any disk, P/N 51N404, that has an S/N listed in Table 1 of this AD or any disk removed as specified in paragraph (f) of this AD except as allowed by paragraph (h) of this AD. Alternative Methods of
Unsafe condition
This AD results from a report of improperly manufactured LPT stage 4 disks. We are issuing this AD to prevent an uncontained engine failure due to low-cycle fatigue, which could result in damage to the airplane.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1