AD 2005-08-16 Airworthiness Directives; BAE Systems (Operations) Limited Model Avro 146-RJ Series Airplanes

Models named: Avro 146-RJ series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to all BAE Systems (Operations) Limited Model Avro 146-RJ series airplanes, 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. Part Number Inspection (f) Within four months after the effective date of this AD, inspect the Thales Avionics DBI to determine whether a part number (P/N) and serial number (S/N) listed in the Effectivity of BAE Systems (Operations) Limited Modification Service Bulletin SB.34-371-70671A, dated September 19, 2003, is installed. Instead of an inspection of the DBI, a review of airplane maintenance records is acceptable if the P/N and the S/N of the DBI can be positively determined from that review. (1) If the DBI P/N and S/N do not match those listed in the service bulletin, no further action is required by this paragraph. (2) If the DBI P/N and S/N do match those listed in the service bulletin, within four months after the effective date of this AD, replace the DBI in accordance with the Accomplishment Instructions of the service bulletin. The replacement part must be either a new DBI having P/N 63543-280-1 and a S/N not listed in the service bulletin, or a new DBI having P/N 63543-280-2. Parts Installation (g) As of the effective date of this AD, no person may install a DBI with a P/N and S/N listed in the Effectivity of BAE Systems (Operations) Limited Modification Service Bulletin SB.34-371-70671A, dated September 19, 2003, on any airplane unless the DBI has been modified in accordance with paragraph (f)(2) of this AD. No Reporting (h) Although the service bulletin references a reporting requirement in paragraph 2.C.2, “Documentation,” that reporting is not required by this AD. Alternative Methods of Compliance (AMOCs) (i) The Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. Related Information (j) British airworthiness directive G-2004-0006, dated March 2, 2004, also addresses the subject of this AD. Material Incorporated by Reference (k) You must use BAE Systems (Operations) Limited Modification Service Bulletin SB.34-371-70671A, dated September 19, 2003, 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 this document in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. To get copies of the service information, contact British Aerospace Regional Aircraft American Support, 13850 Mclearen Road, Herndon, Virginia 20171. To view the AD docket, contact the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., room PL-401, Nassif Building, Washington, DC. To review copies of the service information, contact the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. Issued in Renton, Washington, on April 14, 2005. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-8096 Filed 4-22-05; 8:45 am] BILLING CODE 4910-13-P

This AD was prompted by a report of defective electrical insulators in distance bearing indicators (DBI). We are issuing this AD to prevent a short circuit in the DBI due to defective electrical insulation, which could potentially cause a loss of primary navigation instruments (such as airspeed indicator, altimeter, and global positioning system (GPS) information).