AD 97-02-12

97-02-12 ROLLS-ROYCE PLC: Amendment 39-9897. Docket 96-ANE-09. Applicability: Rolls-Royce plc. (R-R) Models RB211-535E4 and -535E4-B turbofan engines installed on Boeing 757-200 series aircraft. 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 (c) 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 prevent compressor stall and subsequent engine rundown on one or both engines, accomplish the following: (a) No later than 9 calendar months after the effective date of this AD, install a fuel flow governor (FFG) that incorporates a revised minimum compressor discharge P4 stop setting, in accordance with R-R Mandatory Service Bulletin (SB) No. RB.211-73-B869, Revision 1, dated May 24, 1996. (b) Installation of improved FFGs on both engines for each Boeing 757 aircraft in accordance with paragraph (a) of this AD constitutes terminating action to the requirements of AD 96-04-11. (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 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. (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 R-R Mandatory SB:

Document No Pages Revision Date RB.211-73-B869 1-4 1 May 24, 1996

5-9 Original February 12, 1996 Supplement 1 Original February 12, 1996 Total Pages: 10.

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 Rolls-Royce plc, P.O. Box 31, Moor Lane, Derby, DE248BJ, United Kingdom; telephone 1332-249428, fax 1332-249423. 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 April 4, 1997.