2000-21-10: Support Assemblies

2000-21-10 CFE Company: Amendment 39-11942. Docket 2000-NE-40-AD. Applicability: This AD is applicable to CFE Company CFE738-1-1B turbofan engines with support assembly, part numbers (P/N's) 3050860-2, -3, and -5 through -9 inclusive, installed. These engines are installed on, but not limited to, Dassault Aviation Falcon 2000 series airplanes. 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 (d) 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: Compliance with this AD is required as indicated, unless already done. To prevent the static seal from moving forward, which could result in contact between the seal face and stage 2 HPT rotor, wear, and the possibility of an uncontained failure of the stage 2 HPT rotor, do the following: (a) Remove support assembly, P/N 3050860-2, -3, -5 through -9, and replace it with a serviceable seal assembly in accordance with the Accomplishment instructions 2.A.(3) through 2.A.(8)(d) and 2.B.(1) through 2.B.(3) of ASB CFE738 A72-8042, Revision 1, dated September 25, 2000, as follows: Engines That Have Already Been Inspected (1) For engines that have been inspected using CFE Company alert service bulletin (ASB) ASB CFE738 A72-8041, dated August 21, 2000, replace the support assembly as follows: Operating hours time-since new (TSN) on the effective date of this AD Replace by the earlier of Fewer than 500 hours TSN. 150 hours time-in-service (TIS) or 90 days after the effective date of this AD. 500 hours to 1,000 hours TSN. 250 hours TIS or 150 days after the effective date of this AD. More than 1,000 hours TSN. 400 hours TIS or 240 days after the effective date of this AD. Engines That Have Not Been Inspected (2) For engines that have not been inspected using CFE Company alert service bulletin (ASB) ASB CFE738 A72-8041, dated August 21, 2000, do EITHER of the following within the earlier of 50 hours TIS or 30 days after the effective date of this AD: (i) Replace the support assembly with a serviceable support assembly in accordance with the Accomplishment instructions 2.A.(3) through 2.A.(8)(d) and 2.B.(1) through 2.B.(3) of ASB CFE738 A72-8042, and 2.A. or 2.B. of SB CFE738-72-8043, Revision 1, dated October 2, 2000 OR (ii) Inspect the engine in accordance with the Accomplishment Instructions 2.A. through 2.B.(6) of ASB CFE738-A72-8041, dated August 21, 2000, and then replace the support assembly in accordance with the replacement schedule in paragraph (a)(1) of this AD. Support Assembly Seal Break-in (b) After the seal has been replaced, do the support assembly seal break-in procedure in accordance 2.A. (test cell) or 2.B. (on wing) of SB CFE738-72-8043, Revision 1, dated October 2, 2000, Definition of a Serviceable Part (c) For the purposes of this AD, a serviceable support assembly is defined as a support assembly with P/N 3050860-10, or -11, P/N 3057005-1 through -5 inclusive, or P/N 3057006-1,or -2. Alternative Methods of Compliance (d) 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 (ECO). Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send itto the Manager, ECO. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the ECO. Special Flight Permits (e) 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 airplane to a location where the requirements of this AD can be accomplished. Documents that Have Been Incorporated by Reference (f) The actions specified in this AD must be done in accordance with the following CFE Company service bulletins: Document No. Pages Revision Date ASB CFE738-A72-8041 All Original August 21, 2000 Total pages: 26. ASB CFE738-A72-8042 All 1 September 25, 2000 Total pages: 22. SB CFE738-72-8043 All 1 October 2, 2000 Total pages: 28. This incorporation by reference was approved by the Director of the Federal Register in accordance with5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from CFE Company, Data Distribution, MS 64-03/2101-201, P.O. Box 52170, Phoenix, AZ 85972-2170; telephone (602) 365-2493, fax (602) 365-5577. 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. Effective Date of This AD (g) This amendment becomes effective on November 8, 2000.