2001-17-14: LPT Conical Supports

2001-17-14 CFM International: Amendment 39-12405. Docket 2001-NE-15-AD. Applicability This airworthiness directive (AD) is applicable to CFM International (CFMI) CFM56-5C4/1 series turbofan engines with low pressure turbine (LPT) conical support, part number (P/N) 337-002-407-0, installed. These engines are installed on, but not limited to Airbus Industrie A320 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 (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. To prevent an LPT conical support from remaining in service beyond its certified cyclic life limit, which could result in an uncontained engine failure and damage to the airplane, accomplish the following: (a) Remove LPT conical support, P/N 337-002-407-0, at or before accumulating 9,350 cycles-since-new (CSN) and replace with a serviceable part. (b) After the effective date of this AD, do not install any LPT conical support, P/N 337-002-407-0 with 9,350 CSN or greater, into CFM56-5C4/1 model engines. (c) This AD reestablishes the certified cyclic life limit for LPT conical support, P/N 337-002-407-0, which was published incorrectly in the Time Limits Section of Chapter 5 of the CFM56-5C Engine Shop Manual. This Manual will be revised to correct this error. Thereafter, exceptas provided in paragraph (d) of this AD, no alternative cyclic retirement life limits may be approved for LPT conical support, P/N 337-002-407-0. 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 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. Effective Date of This AD (e) This amendment becomes effective on September 7, 2001.