AD 2006-04-04 Airworthiness Directives; Meggitt Model 602 Smoke Detectors Approved Under Technical Standard Order (TSO) TSO-C1C and Installed on Various Transport Category Airplanes, Including but Not Limited to Aerospatiale Model ATR42 and ATR72 Airplanes; Boeing Model 727 and 737 Airplanes; McDonnell Douglas Model DC-10-10, DC-10-10F, DC-10-15, DC-10-30 and DC-10-30F (KC-10A and KDC-10), DC-10-40, DC-10-40F,

Models named: Aerospatiale ATR42-200, -300, -320, -500. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Meggitt Model 602 smoke detectors approved under Technical Standard Order (TSO) TSO-C1C and having any P/N 8930-( ) identified as a “Current Part Number” in Meggitt Service Information Letter 8930-26-01, Revision C, dated May 25, 2005, as installed on various transport category airplanes, certificated in any category, including but not limited to the airplane models listed in Table 1 of this AD. Table 1.—Certain Affected Airplanes Manufacturer Model Aerospatiale ATR42-200, -300, -320, and -500 airplanes. ATR72-101, -201, -102, -202, -211, -212, and -212A airplanes. Boeing 727, 727C, 727-100, 727-100C, 727-200, and 727-200F series airplanes. 737-100, -200, -200C, -300, -400, -500, -600, -700, -700C, -800 and -900 series airplanes. McDonnell Douglas DC-10-10 and DC-10-10F; DC-10-15; DC-10-30 and DC-10-30F (KC-10A and KDC-10); and DC-10-40 and DC-10-40F airplanes. MD-10-10F and MD-10-30F airplanes. MD-11 and MD-11F airplanes.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Smoke Detector Identification/Replacement (f) Within 6 months after the effective date of this AD, replace the affected smoke detector with a modified smoke detector, in accordance with Meggitt Service Information Letter 8930-26-01, Revision C, dated May 25, 2005. Replacement of a smoke detector before the effective date of this AD is also acceptable if done in accordance with the original issue of Meggitt Service Information Letter 8930-26-01, dated November 8, 2004; Revision A, dated November 8, 2004; or Revision B, dated January 19, 2005. Effect on AD 2005-02-04 (g) For airplanes subject to the requirements of AD 2005-02-04: After all affected smoke detectors have been replaced with modified smoke detectors in accordance with paragraph (f) of this AD, the operational limitation required by paragraph (h) of AD 2005-02-04 is terminated and may be removed from the airplane flight manual. Parts Installation (h) On or after the effective date of this AD, no person may install on any airplane a Meggitt Model 602 smoke detector having any P/N 8930-( ) identified as a “Current Part Number” in Meggitt Service Information Letter 8930-26-01, Revision C, dated May 25, 2005. Alternative Methods of Compliance (AMOCs) (i)(1) The Manager, Los Angeles 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 (j) You must use Meggitt Service Information Letter 8930-26-01, Revision C, dated May 25, 2005, 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 Meggitt Safety Systems Inc., 1915 Voyager Avenue, Simi Valley, California 93063, 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 February 1, 2006. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 06-1408 Filed 2-16-06; 8:45 am] BILLING CODE 4910-13-P

This AD is prompted by a report indicating that the affected smoke detectors can “lock up” during electrical power transfer from the auxiliary power unit (APU) to the engines. We are issuing this AD to identify and provide corrective action for a potentially inoperative smoke detector and to ensure that the flightcrew is alerted in the event of a fire.