Airworthiness directives › 2003-09-06
AD 2003-09-06 Airworthiness Directives; General Electric Company CF6-50 Series Turbofan Engines
Applicability*9
This airworthiness directive (AD) is applicable to General Electric Company CF6-50 series turbofan engines with low pressure turbine (LPT) stage 1 disks, part number (P/N) 9061M21P03, serial numbers (SNs) SNL17693, SNL17694, SNL44200, SNL47624, SNL47625, SNL47626, SNL47627, and SNL47628 installed. These engines are installed on, but not limited to Airbus Industrie A300, Boeing 747, and McDonnell Douglas DC-10 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 (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.
Compliance
Compliance with this AD is required as indicated, unless already done. To prevent LPT stage 1 disk cracking due to the potential for iron-rich inclusions introduced during manufacture, leading to uncontained disk failure, do the following: (a) Remove from service LPT stage 1 disks P/N 9061M21P03, SNs SNL17693, SNL17694, SNL44200, SNL47624, SNL47625, SNL47626, SNL47627, and SNL47628 at the next engine shop visit. (b) After the effective date of this AD, do not install any of the LPT stage 1 disks listed in paragraph (a) of this AD into any engine. Alternative Methods of Compliance (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 (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 (d) Special flight permits may be issued in accordance with §§ 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 (e) This amendment becomes effective on June 3, 2003. Issued in Burlington, Massachusetts, on April 22, 2003. Robert E. Guyotte, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 03-10508 Filed 4-28-03; 8:45 am] BILLING CODE 4910-13-P
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