2001-26-06: Fan Rotor Disks

2001-26-06 CFE Company: Amendment 39-12570. Docket 2001-NE-28-AD. Applicability: This airworthiness directive (AD) is applicable to CFE Company model CFE738-1-1B turbofan engines that contain fan rotor disks part number (P/N) 3050745-2, serial numbers (SN's) 000322903511 through 000322903536, and 000322903538 through 000322903541. These engines are installed on, but not limited to Dassault Aviation 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 (g) 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 remove from service affected fan disks, which if not removed, could result in uncontained engine failure and damage to the airplane, do the following: (a) Remove from service before further flight, the following serial number (SN) fan rotor disks listed in Table 1: Table 1. SN's of Fan Rotor Disks Requiring Removal Before Further Flight 000322903512 000322903513 000322903516 000322903517 000322903518 000322903519 000322903520 000322903521 000322903523 000322903524 000322903525 000322903527 000322903528 000322903529 000322903530 000322903531 000322903533 000322903534 000322903535 000322903536 000322903538 000322903539 000322903540 000322903541 (b) Remove from service within 10 engine cycles-in-service after the effective date of this AD, fan rotor disks SN's 000322903511, 000322903515, and 000322903526. (c) Remove from service within 70 engine cycles-since-new (CSN), fan rotor disk SN 000322903514. (d) Remove from service within 140 engine CSN, fan rotor disks SN 000322903522 and 000322903532. (e) The manufacturer's records indicate that fan rotor disks identified in paragraphs (a) through (d) of this AD were installed in, and may still be installed in the engines listed by SN in the following Table 2. This AD, however, applies to any engine with the fan rotor disks installed, identified in paragraphs (a) through (d) of this AD. Table 2 is provided for informational purposes only to assist in locating engines that may be affected. For information on replacing the affected fan rotor disks in this AD, see CFE Company Alert Service Bulletin CFE738-A72-8053, dated July 24, 2001. 105430 105432105434 105438 105441 105443 105444 105445 105446 105447 105448 105450 105451 105452 105453 105454 105455 105456 105457 105459 105461 105462 105463 105466 105467 105469 105471 105472 105474 105475 (f) After the effective date of this AD, do not install any fan rotor disks P/N 3050745-2, SN's 000322903511 through 000322903536, and 000322903538 through 000322903541 onto any engine. Alternative Methods of Compliance (g) 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 requests 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 (h) 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 aircraft to a location where the requirements of this AD can be done. Effective Date (i) This amendment becomes effective on January 7, 2002.