AD 2006-01-04 Airworthiness Directives; Raytheon Model DH.125, HS.125, and BH.125 Series Airplanes; Model BAe.125 Series 800A (C-29A and U-125), 800B, 1000A, and 1000B Airplanes; and Model Hawker 800 (including variant U-125A), and 1000 Airplanes

Makes named: raytheon. Models named: DH.125, HS.125, BH.125 series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Raytheon Model DH.125, HS.125, and BH.125 series airplanes; Model BAe.125 Series 800A (C-29A and U-125), 800B, 1000A, and 1000B airplanes; and Model Hawker 800 (including variant U-125A), and 1000 airplanes, certificated in any category; as identified in Raytheon Service Bulletin SB 21-3669, dated December 2004.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Modification or Replacement (f) Within 1,200 flight hours or 24 months after the effective date of this AD, whichever occurs first, do the action in either paragraph (f)(1) or (f)(2) of this AD in accordance with the Accomplishment Instructions of Raytheon Service Bulletin SB 21-3669, dated December 2004. (1) Modify the existing fan venturi part number (P/N) 132322-2-1 by installing an improved motor, P/N 207640-34. (2) Replace the existing fan venturi P/N 132322-2-1 with a new fan venturi P/N 132322-3-1. Note 1: Raytheon Service Bulletin SB 21-3669 refers to Honeywell Service Bulletin 132322-21-4041, Revision 2, dated August 20, 2004, as an additional source of service information for doing the modification. The Raytheon service bulletin includes the Honeywell service bulletin. Parts Installation (g) As of the effective date of this AD, no person may install a fan venturi, P/N 132322-2-1, on any airplane unless the fan venturi has been modified in accordance with paragraph (f)(1) of this AD; or unless the fan venturi has a new P/N in accordance with paragraph (f)(2) of this AD. Alternative Method of Compliance (AMOC) (h)(1) The Manager, Wichita Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. (2) Before using any AMOC approved in accordance with 14 CFR 39.19 on any airplane to which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office. Material Incorporated by Reference (i) You must use Raytheon Service Bulletin SB 21-3669, dated December 2004, including Honeywell Service Bulletin 132322-21-4041, Revision 2, dated August 20, 2004, to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference of this document in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Raytheon Aircraft Company, Department 62, P.O. Box 85, Wichita, Kansas 67201-0085, for a copy of this service information. You may review copies at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., room PL-401, Nassif Building, Washington, DC; on the Internet at http://dms.dot.gov ; or at 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 December 23, 2005. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 06-403 Filed 1-17-06; 8:45 am] BILLING CODE 4910-13-P

This AD results from reports indicating that the fan venturi overheated and produced smoke while the airplane was on the ground. We are issuing this AD to prevent heat and fire damage to equipment adjacent to the fan venturi, which could result in smoke in the cabin and/or burning equipment.