AD 2004-26-08 Airworthiness Directives; Bombardier Model CL-215-6B11 (CL215T Variant) and CL-215-6B11 (CL415 Variant) Series Airplanes

This AD applies to Bombardier Model CL-215-6B11 (CL215T variant) series airplanes, having serial numbers (S/N) 1056 through 1125 inclusive, and Model CL-215-6B11 (CL415 variant) series airplanes having S/Ns 2001 through 2053 inclusive; certificated in any category.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Replacement (f) Within 12 months after the effective date of this AD, replace the mounting pad studs of the auxiliary feather pump with new, longer studs, and install a pressure relief valve; in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 215-3108, dated March 28, 2001 (for Model CL-215-6B11 (CL215T variant) series airplanes); or Bombardier Service Bulletin 215-4234, dated March 28, 2001 (for Model CL-215-6B11 (CL415 variant) series airplanes); as applicable. Note 1: Bombardier Service Bulletin 215-3108 and Bombardier Service Bulletin 215-4234 refer to Pratt & Whitney Canada Service Bulletin PW100-72-21636, Revision 2, dated June 26, 2002, as an additional source of service information for accomplishing the replacement of the mounting pad studs. No Reporting (g) Although the service bulletin refers to a reporting requirement in paragraph 2.B, that reporting is not required by this AD. Alternative Methods of Compliance (AMOCs) (h) The Manager, New York Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Related Information (i) Canadian airworthiness directive CF-2002-14, dated February 13, 2002, also addresses the subject of this AD. Material Incorporated by Reference (j) You must use Bombardier Service Bulletin 215-3108, dated March 28, 2001; or Bombardier Service Bulletin 215-4234, dated March 28, 2001; as applicable; to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approves the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. For copies of the service information, contact Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station Centre-ville, Montreal, Quebec H3C 3G9, Canada. For information on the availability of this material at the National Archives and Records Administration (NARA), call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html . You may view the AD docket at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., Room PL-401, Nassif Building, Washington, DC. Issued in Renton, Washington, on December 20, 2004. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-101 Filed 1-4-05; 8:45 am] BILLING CODE 4910-13-P

This AD was prompted by a few incidents of external oil leaks from the oil pump of the power control unit due to a malfunction of the pressure regulating valve. We are issuing this AD to prevent fracturing of the pump body, which could result in loss of engine oil, and consequent inability to maintain engine oil pressure and to feather the propeller.