86-08-04 R1 PRATT & WHITNEY: Amendment 39-5287 as amended by Amendment 39-5424. Applies to Pratt & Whitney (PW) JT8D-1, -1A, -1B, -7, -7A, -7B, -9, -9A, -11, -15, -15A, -17, -17A, -17R, and -17AR turbofan engines.
Compliance is required as indicated unless already accomplished.
To prevent crack propagation and subsequent high pressure compressor (HPC) removable sleeve spacer rupture, perform a one time, eddy current inspection of HPC removable sleeve spacers stages 7-8, 8-9, and 9-10 for cracks, and replace all stages of HPC removable sleeve spacers with the respective HPC integral sleeve spacers, in accordance with the procedures of PW Alert Service Bulletin (ASB) 5649, dated January 15, 1986, or FAA approved equivalent, per the following schedule:
(a) For HPC removable sleeve spacers stages 7-8, 8-9, and 9-10:
(1) Inspect spacers within the next 1,000 cycles in service from the effective date of this AD, or prior to reaching 1,700 cycles since the last in-shop fluorescent penetrant or ultrasonic inspection, whichever occurs later.
(2) Remove cracked spacers from service prior to further flight.
(3) Report the following information in writing for each inspection within 30 days of the inspection to the Manager, Engine Certification Office, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803, (telex No. 949301 FAANE BURL) (reporting approved by the Office of Management and Budget (OMB) under OMB Number 2120-1156).
(i) Engine serial number
(ii) Inspection date
(iii) Spacer part number and serial number
(iv) Spacer total time and cycles
(v) Spacer time and cycles since last inspection
(vi) Spacer disposition (crack indication, no crack indication)
(vii) If a crack indication is present, report confirmation of location and crack size within 30 days after engine disassembly.
(b) Replace HPC removable sleeve spacers stages 7-8, 8-9, and 9-10 with the integral sleeve spacers at the next HPC rotor disassembly, but not to exceed 2 calendar years or 4,000 cycles in service, whichever occurs later from the effective date of this AD.
(c) Replace HPC removable sleeve spacers stages 10-11, 11-12, and 12-13 with the integral sleeve spacers at the next HPC rotor disassembly.
NOTES: (1) For the purposes of this AD, HPC rotor disassembly is defined as removal of any disk, spacer, or hub from the HPC rotor.
(2) For the purposes of this AD, the last in-shop fluorescent penetrant or ultrasonic inspection is that conducted in accordance with the procedures identified and described in the PW JT8D restructured Engine Manual Part Number 481672 or FAA approved equivalent.
Aircraft may be ferried in accordance with the provisions of FAR Parts 21.197 and 21.199 to a base where the AD can be accomplished.
Upon request, an equivalent means of compliance with the requirements of this AD may be approved by the Manager, Engine Certification Office, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803.
Upon submission of substantiating data by an owner or operator through an FAA maintenance inspector, the Manager, Engine Certification Office, New England Region, may adjust the compliance time specified in this AD.
PW ASB 5649, dated January 15, 1986, identified and described in this directive, is incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received this document from the manufacturer may obtain a copy upon request to Pratt & Whitney, Publication Department, P.O. Box 611, Middletown, Connecticut 06457. This document also may be examined at the Office of the Regional Counsel, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803, Rules Docket Number 85-ANE-46, Room Number 311, between the hours of 8:00 a.m. and4:30 p.m., Monday through Friday except Federal holidays.
The provisions of this amendment applicable to the stage 8-9 spacer become effective on the effective date of this amendment. The remaining provisions of this amendment applicable to stages 7-8 and 9-10 spacers are effective on May 27, 1986.
This amendment amends Amendment 39-5287 (51 FR 12690), AD 86-08-04.
This amendment becomes effective on November 4, 1986.