2010-18-13: Blade

2010-18-13 Pratt & Whitney: Amendment 39-16427. Docket No. FAA-2010- 0217; Directorate Identifier 2009-NE-23-AD. Effective Date (a) This airworthiness directive (AD) becomes effective October 18, 2010. Affected ADs (b) None. Applicability (c) This AD applies to Pratt & Whitney (PW) PW4052, PW4056, PW4060, PW4062, PW4062A, PW4074, PW4077, PW4077D, PW4084D, PW4090, PW4090-3, PW4152, PW4156A, PW4158, PW4164, PW4168, PW4168A, PW4460, and PW4462 turbofan engines. These engines are installed on, but not limited to, Boeing 747-400, 767-200, 767-300, 777-200, and 777-300 airplanes; McDonnell Douglas MD-11 airplanes; and Airbus A300-600, A310-300, and A330-200 airplanes. Unsafe Condition (d) This AD results from reports of cracked locking and loading slots in the high-pressure compressor (HPC) drum rotor disk assembly. We are issuing this AD to detect cracks in the locking and loading slots in the HPC drum rotor disk assemblies, which could result in rupture of the HPC drum rotor disk assembly and damage to the airplane. Compliance (e) You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. Local Fluorescent Penetrant Inspection (f) Perform a local fluorescent penetrant inspection for cracks in the HPC drum rotor disk assembly blade locking and loading slots of the specific stages of the HPC drum rotor disk assemblies from which any of the blades are removed as specified in Table 1 of this AD. Table 1--Compliance Times and Service Bulletins by Engine Model For Engine Model Inspect whenever ... Use... (1) PW4074, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3. Any of the 13thor 14thstage blades are removed during a shop visit. Paragraphs 1.A. through 1.B. of the Accomplishment Instructions of PW4G-112-72-264, Revision 2, dated February 23, 2010. (2) PW4164, PW4168, and PW4168A. Any of the 13th, 14th, or 15thstage blades are removed during a shop visit. Paragraphs 1.A. through 1.C of the Accomplishment Instructions of PW4G-100-72-186, Revision 1, dated September 2, 2004. (3) PW4052, PW4056, PW4060, PW4062, PW4062A, PW4152, PW4156A, PW4158, PW4460, and PW4462. Any of the 13th, 14th, or 15th stage blades are removed during a shop visit. Paragraphs 1.A. through 1.C. of the Accomplishment Instructions of PW4ENG 72-796, dated June 11, 2009. (g) Remove from service any HPC drum rotor disk assembly found with a crack in the blade loading and locking slots of the HPC drum rotor disk assembly. Alternative Methods of Compliance (h) The Manager, Engine Certification Office, has the authority to approve alternative methods of compliance for this AD if requested using the procedures found in 14 CFR 39.19. Related Information (i) Contact Rose Len, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA01803; e-mail: rose.len@faa.gov; telephone (781) 238-7772; fax (781) 238-7199, for more information about this AD. Material Incorporated by Reference (j) You must use the service information specified in the following Table 2 to perform the inspections required by this AD. The Director of the Federal Register approved the incorporation by reference of the documents listed in the following Table 2 in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Pratt & Whitney, 400 Main St., East Hartford, CT 06108; telephone (860) 565- 7700; fax (860) 565-1605, for a copy of this service information. You may review copies at the FAA, New England Region, 12 New England Executive Park, Burlington, MA; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http:// www.archives.gov/federal-register/cfr/ibr-locations.html. Table 2--Incorporation by Reference Pratt & Whitney Service Bulletin No. Page Revision Date PW4G-100-72-186 Total Pages: 11 ALL 1 September 2, 2004 PW4G-112-72-264 Total Pages: 11 ALL 2 February 23, 2010 PW4ENG 72-796 Total Pages: 22 ALL Original June 11, 2009