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Airworthiness directives › 98-20-18

AD 98-20-18 Airworthiness Directives; International Aero Engines (IAE) V2500- A1 Series Turbofan Engines

1998-11-30
1998-11-13
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Engine
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Applicability*9

International Aero Engines (IAE) V2500-A1 series turbofan engines, with high pressure turbine (HPT) stage 1 disks, part number (P/N) 2A1801, serial numbers (S/Ns) P100430, P100421, P100621, and P100618; HPT stage 1 disk, P/N 2A1101, S/ [[Page 63400]] N P100346; and HPT stage 2 disk, P/N 2A0902, S/N P100381, installed. These engines are installed on Airbus A320 series aircraft. Note 1: This airworthiness directive (AD) applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.

Compliance

Required as indicated, unless accomplished previously. To prevent an HPT disk fracture, an uncontained engine failure, and damage to the aircraft, accomplish the following: (a) Prior to further flight, remove from service and replace with a serviceable part the following affected HPT disks: ------------------------------------------------------------------------ Engine on HPT disk P/N S/N which part may be installed ------------------------------------------------------------------------ Stage 1....................... 2A1801..... P100430.... V0122 2A1801..... P100421.... V0134 2A1801..... P100621.... V0137 2A1801..... P100618.... V0149 2A1101..... P100346.... Removed Stage 2....................... 2A0902..... P100381.... V0127 ------------------------------------------------------------------------ (b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Engine Certification Office. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Engine Certification Office. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Engine Certification Office. (c) This amendment becomes effective November 30, 1998, to all persons except those persons to whom it was made immediately effective by priority letter AD 98-20-18, issued September 14, 1998, which contained the requirements of this amendment. Issued in Burlington, Massachusetts, on November 4, 1998. David A. Downey, Assistant Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 98-30331 Filed 11-12-98; 8:45 am] BILLING CODE 4910-13-P

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