AD 98-13-20 Airworthiness Directives; Rolls-Royce Limited, Aero Division- Bristol, S.N.E.C.M.A., Olympus 593 Series Turbojet Engines

Makes named: concorde. Read the applicability below — it usually turns on serial or part numbers too.

Rolls-Royce Limited (R-R), Aero Division-Bristol, S.N.E.C.M.A., Olympus 593 Mk. 610-14-28 turbojet engines, installed on but not limited to British Aerospace/Aerospatiale Concorde 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.

Required as indicated, unless accomplished previously. To prevent combustion chamber detachment, which could result in an inflight engine shutdown or an engine fire, accomplish the following: (a) At the next combustor exposure after the effective date of this AD, accomplish the following in accordance with the Accomplishment Instructions of R-R Service Bulletin (SB) No. OL.593- 72-9038-417, dated June 26, 1996: (1) Perform a radiological inspection of the combustion chamber No. 2 outer cooling ring scoop circumferential and axial weld for weld quality. (2) If the weld quality does not meet the standards described in the SB, reweld and then perform an additional radiological inspection for weld quality prior to return to service. (b) At the next combustor exposure after the effective date of this AD, accomplish the following in accordance with the Accomplishment Instructions of R-R SB No. OL.593-72-9048-424, dated April 25, 1997: (1) Perform an inspection of the combustion chamber No. 2 inner and outer cooling ring for web length. (2) If the web length is acceptable within the limits described in the SB, mark the letter ``T'' adjacent to the part number. (3) If the web length is not acceptable within the limits described in the SB, remove the combustion chamber from service and replace affected components with serviceable parts prior to return to service. (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. 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. (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 inspection requirements of this AD can be accomplished. (e) The actions required by this AD shall be performed in accordance with the following R-R SBs: ------------------------------------------------------------------------ Document No. Pages Date ------------------------------------------------------------------------ OL.593-72-9038-417................ 1-3 June 26, 1996. Total pages: 3. OL.593-72-9048-424................ 1-4 April 25, 1997. Total pages: 4. ------------------------------------------------------------------------ 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, PO Box 3, Filton, Bristol BS12 7QE, England; telephone 01-17-979-1234, fax 01-17-979- 7575. 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. (f) This amendment becomes effective on July 10, 1998. Issued in Burlington, Massachusetts, on June 11, 1998. Jay J. Pardee, Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 98-16270 Filed 6-24-98; 8:45 am] BILLING CODE 4910-13-U