2002-09-10: High Pressure Turbine (HPT) Stage 1 Aft Cooling Plate and HPT Stage 2 Disk

2002-09-10 CFE Company: Amendment 39-12743. Docket No. 2001-NE-04-AD. Applicability This airworthiness directive (AD) is applicable to CFE Company model CFE738-1-1B turbofan engines with high pressure turbine (HPT) stage 1 aft cooling plates, part number (P/N) 6083T38P07, and HPT stage 2 disks, P/N's 6083T92P06, 6083T92P07, 6083T92P08, 6083T92P10, and 6083T92P11, installed. These engines are installed on, but not limited to Dassault-Breguet Falcon 2000 series airplanes. Note 1: This 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 (e) of this AD. The request should include an assessment of theeffect 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 failure of the HPT stage 1 aft cooling plate and HPT stage 2 disk due to exceeding the life limit, do the following: (a) Replace the HPT stage 1 aft cooling plate P/N 6083T38P07 at or before the cooling plate accumulates 3,500 cycles-since-new (CSN). (b) Replace HPT stage 2 disks, P/N's 6083T92P06, 6083T92P07, 6083T92P08, 6083T92P10, and 6083T92P11; at or before the disk accumulates 2,700 CSN. (c) After the effective date of this AD, do not install any HPT stage 1 aft cooling plate, P/N 6083T38P07, that exceeds 3,500 CSN. (d) After the effective date of this AD, do not install any HPT stage 2 disk, P/N 6083T92P06, 6083T92P07, 6083T92P08, 6083T92P10, or 6083T92P11, that exceeds 2,700 CSN. Alternative Methods of Compliance (e) 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 must submit their request through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to 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 (f) Special flight permits may be issued in accordance with Secs. 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 done. Effective Date (g) This amendment becomes effective on June 12, 2002.