2000-22-07: High Pressure Turbine (HPT)

2000-22-07 International Aero Engines AG: Amendment 39-11953 Docket No. 2000-NE-21-AD. Applicability: International Aero Engines AG (IAE) V2500-A5 and -D5 series turbofan engines listed by Serial Number (S/N) as follows: V10011 V10054 V10121 V10166 V10341 V20023 V10035 V10067 V10123 V10172 V20001 V20033 V10036 V10079 V10124 V10174 V20013 V20037 V10039 V10080 V10130 V10180 V20017 V10040 V10084 V10131 V10199 V20019 V10041 V10111 V10139 V10221 These engines are installed on, but not limited to, Airbus Industries A319, A320, A321 series, and McDonnell Douglas MD-90 series airplanes. 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 isaffected, 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 restore the engines to type design and to prevent possible low cycle fatigue (LCF) failure of the HPT stage 1 disk, which could lead to an uncontained engine failure and damage to the airplane, accomplish the following: Removal and Restoration of the HPT Module (a) For those engines identified by serial numbers in Table 1 of this AD, with HPT modules built to configuration X, X', X*, Y, or Z, remove from service in accordance with Table 1 and restore the HPT module to type design in accordance with IAE All Operators Wire (AOW) 1053, Issue 2, dated June 20, 2000. TABLE 1 ENGINE SERIAL NUMBER HPT MODULE CONFIGURATION HPT HARDWARE RECONFIGURE AT OR PRIOR TO: V10084, V10035, V10036, V10039, V10130, V10011, V10040, V10079, V10080, V10124, V10123, V10111, V20013, V20017, V10172, V10174, V20019, V10180, V20023 X High Flow Blades: Post SB72-0242 Low Flow Duct Assembly: Pre SB72-0241 Towel Bar Seals, P/N 2A0530:Installed The earlier of the next shop visit; or accumulating either 5100 cycles in service (CIS) in configuration X, or 100 CIS after the effective date of this AD, whichever occurs later. V20037 X 2 High Flow Blades: Post SB72-0242 Low Flow Duct Assembly : Pre SB72-0241 Towel Bar Seals, P/N 2A0530: Not Installed The earlier of the next shop visit; or accumulating either 7600 CIS in configuration X , or 100 CIS after the effective date of this AD, whichever occurs later V20001,V20033 X* 3 or fewer High Flow Blades: Post SB72-0242 LowFlow Duct Assembly: Pre SB72-0241 Towel Bar Seals, P/N 2A0530: Installed Next Shop Visit V10199, V10166, V10054, V10131, V10139, V10041, V10121, V10067, V10341 Y High Flow Blades: Post SB72-0242 High Flow Duct Assembly: Post SB72-0241 Towel Bar Seals, P/N 2A0530: Installed Next Shop Visit V10221 Z Low Flow Blades: Pre SB72-0242 High Flow Duct Assembly: Post SB72-0241 Towel Bar Seals, P/N 2A0530: Installed Next Shop Visit Alternative Methods of Compliance (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 (ECO). Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, ECO. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the ECO. Special Flight Permits (c) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the aircraft to a location where the requirements of this AD can be accomplished. Incorporation by Reference (d) The restoration to type design must be done in accordance with IAE AOW 1053, Issue 2, dated June 20, 2000. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from International Aero Engines AG, 400 Main Street, East Hartford, CT 06108; telephone: (860) 565- 5515; fax (860) 565-5510. Copies may be inspected at the FAA New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA, or at the Office of the Federal Register, 800 North Capitol Street, NW, suite 700, Washington, DC. Effective Date of this AD (e) This amendment becomes effective on December 6, 2000.