|
95-26-03
|
|||
|
Compressor Disk Failure Category
- Engine Applicability: Pratt & Whitney (PW) Models JT8D-1, -1A, -1B, -7, -7A, -9, -9A, -11, -15, -15A, -17, -17A, -17R, -17AR engines with serial numbers specified in Section 2 of PW Alert Service Bulletin (ASB) No. A6226, dated October 17, 1995. These engines are installed on but not limited to Boeing B727 and B737, and McDonnell Douglas DC-9 aircraft. Note: 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 use the authority provided in paragraph (c) to request approval from the Federal Aviation Administration (FAA). This approval may address either no action, if the current configuration eliminates the unsafe condition, or different actions necessary to address the unsafe condition described in this AD. Such a request should include an assessment of the effect of the changed configuration on the unsafe condition addressed by this AD. In no case does the presence of any modification, alteration, or repair remove any engine from the applicability of this AD. Compliance: Required as indicated, unless accomplished previously. To prevent an uncontained high pressure compressor (HPC) disk failure, which can result in damage to the aircraft, accomplish the following: (a) Perform a records search, inspect if necessary, repair or replace if necessary, and report results, of stage 7 through 12 HPC disks in accordance with the intervals and procedures of paragraph 2.A through 2.D of PW ASB No. A6226, dated October 17, 1995. Reporting requirements have been approved by the Office of Management and Budget and assigned OMB control number 2120-0056. (b) For the purpose of this AD, the accomplishment effective date to be used for determination of inspection intervals, as required by Section 2.B of PW ASB A6226, dated October 17, 1995, is defined as the effective date of this AD. (c) 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. The request should be forwarded through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Engine Certification Office. Note: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Engine Certification Office. (d) 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. (e) The actions required by this AD shall be done in accordance with the following service document: Document
No. Pages Revision
Date 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 Pratt & Whitney, Publications Department, M/S 132-30, 400 Main St., East Hartford, CT 06108. Copies may be inspected at the FAA, New England Region, Office of the Assistant Chief 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. (f) This amendment becomes effective on May 6, 1996. FOR FURTHER INFORMATION CONTACT: Mark A. Rumizen, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803-5299; telephone (617) 238-7137, fax (617) 238-7199.
|
|||