AD 99-13-01 Airworthiness Directives; International Aero Engines AG V2500-A1 and V2500-A5 Series Turbofan Engines

International Aero Engines AG (IAE) V2500-A1 turbofan engines, all serial numbers (S/Ns), and V2500-A5 turbofan engines, with S/Ns V10079 and below, installed on, but not limited to, Airbus Industries A319, A320, and A321 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 is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (h) 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.

Required as indicated, unless accomplished previously. To prevent failure of the high pressure turbine (HPT) hardware due to ignition of oil trapped by the HPT stage 1 inner rotating airseal (TOBI ID seal), which could result in an uncontained engine failure and damage to the airplane, accomplish the following: (a) Within five cycles after an in-flight shutdown (IFSD), accomplish the actions specified in the following Attachments of IAE All Operators Wire (AOW) 1046, Issue 2, dated May 21, 1999: (1) For V2500-A1 engines with S/N's below V0313, accomplish the actions specified in Attachment III, V2500 No.4 Compartment Oil Loss Risk Elimination Flow Chart; or (2) For V2500-A1 engines with S/N's V0313 and above, accomplish the actions specified in Attachment II, V2500 No.4 Compartment Oil Loss Risk Elimination Flow Chart; or (3) For V2500-A5 engines with S/N's V10079 or below, accomplish the actions specified in Attachment I, V2500 No.4 Compartment Oil Loss Risk Elimination Flow Chart. (4) For the purpose of this AD, engines that have been restarted in flight using normal procedures following an IFSD have used 1 cycle since the IFSD. (b) This AD has no further requirements if no special actions are identified in accordance with the instructions given in IAE AOW 1046, Issue 2, dated May 21, 1999. (c) If a borescope inspection of the HPT TOBI ID seal is required, have IAE inspect in accordance with IAE AOW 1046, Issue 2, dated May 21, 1999. (d) If any evidence of oil wetness or overheat damage is seen with the borescope, disassemble the HPT module, remove from [[Page 31969]] service any part with overheat damage, and replace with a serviceable part. (e) For V2500-A1 engines with S/N's below V0313, incorporation of service bulletins (SB's) V2500-ENG-72-0120, revision 2, dated October 30, 1992 or revision 3, dated May 14, 1999, and V2500-ENG- 72-0351, dated May 31, 1999, constitute terminating action for the requirements specified in paragraph (a) and paragraph (c) of this AD. (f) For V2500-A1 engines with S/N's V0313 and above, incorporation of SB V2500-ENG-72-0351, dated May 31, 1999, constitutes terminating action for the requirements specified in paragraph (a) and paragraph (c) of this AD. (g) For V2500-A5 engines with S/N's V10079 and below, incorporation of SB V2500-ENG-72-0190, revision 2, dated September 26, 1996, constitutes terminating action for the requirements specified in paragraph (a) and paragraph (c) of this AD. (h) 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. (i) Special flight permits may be issued in accordance with Secs. 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 inspection requirements of this AD can be accomplished. (j) The inspection and optional terminating actions must be done in accordance with the following International Aero Engines AG AOW and SB's: ---------------------------------------------------------------------------------------------------------------- Document No. Pages Revision Date ---------------------------------------------------------------------------------------------------------------- AOW 1046........................... All................. Issue 2............ May 21, 1999. Total pages: 6. SB V2500-ENG-72-0120............... All................. 2.................. October 30, 1992. Total pages: 10. SB V2500-ENG-72-0120............... 1................... 3.................. May 14, 1999. 2................... 2.................. October 30, 1992. 3................... 3.................. May 14, 1999. 4 to 7.............. 2.................. October 30, 1992. 8 to 9.............. 3.................. May 14, 1999. 10.................. 2.................. October 30, 1992. Total pages: 10. SB V2500-ENG-72-0190............... 1................... 2.................. September 26, 1996. 2 to 18............. 1.................. April 30, 1994. 19.................. 2.................. September 26, 1996. 20 to 21............ 1.................. April 30, 1994. Total pages: 21. SB V2500-ENG-72-0351............... All................. Original........... May 31, 1999. Total pages: 14. ---------------------------------------------------------------------------------------------------------------- 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, 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. (k) This amendment becomes effective on June 25, 1999. Issued in Burlington, Massachusetts, on June 4, 1999. Mark C. Fulmer, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 99-14933 Filed 6-14-99; 8:45 am] BILLING CODE 4910-13-P