86-20-09: Intermediate Pressure Compressor (IPC) Stage 6 to 7 Rotor Assemblies

86-20-09 ROLLS-ROYCE plc (formerly Rolls-Royce Limited): Amendment 39-5425. Applies to Rolls- Royce (R-R) RB211-22B turbofan engines. Compliance is required as indicated, unless already accomplished. To prevent disk failures that can cause uncontained engine failures, accomplish the following: (a) Remove from service, prior to further flight, all intermediate pressure compressor (IPC) stage 6 to 7 rotor assemblies listed individually by serial numbers in Appendices 1 and 2 of R-R Mandatory Service Bulletin (SB) RB.211-72-6427. Revision 2, dated June 30, 1984, or FAA approved equivalent, that have accumulated total cycles in service since new, on the effective date of this AD, in excess of the service life specified in those appendices. (b) Remove from service all IPC stage 6 to 7 rotor assemblies listed individually by serial number in Appendices 1 and 2 of R-R Mandatory SB RB.211-72-6427, Revision 2, dated June 30, 1984, or FAA approved equivalent, on or before attaining the service life specified in their respective appendix. Aircraft may be ferried in accordance with the provisions of FAR 21.197 and 21.199 to a base where the AD can be accomplished. Upon request, an equivalent means of compliance may be approved by the Manager, Engine Certification Office, Aircraft Certification Division, Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803. R-R Mandatory SB RB.211-72-6427 dated June 30, 1984, identified and described in this document, 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 copies upon request to Rolls- Royce plc, P.O. Box 31, Derby DE2 8BJ, England. This document also may be examined at the Office of the Regional Counsel, Federal Aviation Administration, New England Region, 12 New England Executive Park, Burlington, Massachusetts 01803, Rules Docket Number 85-ANE-35, Room 311, between the hours of 8:00 a.m. and 4:30 p.m., Monday through Friday, except Federal holidays. This amendment becomes effective on November 4, 1986.