AD 2006-07-02 Airworthiness Directives; Bombardier Model DHC-8-301, -311, and -315 Airplanes

Models named: DHC-8-301, -311, -315. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Bombardier Model DHC-8-301, -311, and -315 airplanes, certificated in any category, serial numbers 100 through 593 inclusive.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Replace Pressure Control Valve (f) Within 30 months after the effective date of this AD, replace the pressure control valve of the Type 1 emergency door by incorporating ModSum 8Q101159 in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 8-52-60, Revision A, dated April 28, 2003. Replacement According to Previous Issue of Service Bulletin (g) Replacing the pressure control valve of the Type 1 emergency door is also acceptable for compliance with the requirements of paragraph (f) of this AD if done before the effective date of this AD in accordance the Accomplishment Instructions of Bombardier Service Bulletin 8-52-60, dated August 28, 2002. Alternative Methods of Compliance (AMOCs) (h)(1) The Manager, New York 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. Related Information (i) Canadian airworthiness directive CF-2003-04, dated February 3, 2003, also addresses the subject of this AD. Material Incorporated by Reference (j) You must use Bombardier Service Bulletin 8-52-60, Revision A, dated April 28, 2003, 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 Bombardier, Inc., Bombardier Regional Aircraft Division, 123 Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada, 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 March 17, 2006. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 06-2960 Filed 3-29-06; 8:45 am] BILLING CODE 4910-13-U

This AD results from reports that the pressure control valve of the Type 1 emergency door is susceptible to freezing. We are issuing this AD to ensure that the pressure control valve does not freeze and prevent the door seal from deflating, which could result in the inability to open the door in an emergency.