AD 2006-15-18 Airworthiness Directives; Boeing Model 737-300, -400, -500, -600, -700, -700C, -800, and -900 Series Airplanes

Models named: 737-300, -400, -500 series, 737-600, -700, -700C, -800, -900 series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Boeing Model 737-300, -400, and -500 series airplanes identified in Boeing Special Attention Service Bulletin 737-33-1132, Revision 2, dated September 8, 2005; and Model 737-600, -700, -700C, -800, and -900 series airplanes identified in Boeing Service Bulletin 737-33-1133, Revision 3, dated September 8, 2005; 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. Modification (f) Within 48 months after the effective date of this AD: Modify the wiring for the master dim test system in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737-33-1132, Revision 2, dated September 8, 2005 (for Model 737-300, -400, and -500 series airplanes); and Boeing Service Bulletin 737-33-1133, Revision 3, dated September 8, 2005 (for Model 737-600, -700, -700C, -800, and -900 series airplanes); as applicable. Actions Required To Be Accomplished Prior to or Concurrently With Paragraph (f) of This AD (g) Prior to or concurrently with accomplishment of paragraph (f) of this AD, do the actions specified in Table 1 of this AD, as applicable. Table 1.—Prior/Concurrent Actions For— Accomplish all actions associated with— According to the Accomplishment Instructions of— Group 57 airplanes identified in Boeing Special Attention Service Bulletin 737-33-1132, Revision 2, dated September 8, 2005 Installing an engine instrument system (EIS) and Boeing Service Bulletin 737-77-1022, Revision 1, dated October 26, 1989.   Modifying the advisory system for the EIS Boeing Service Bulletin 737-77-1023, Revision 1, dated November 9, 1989. Group 37 and 46 airplanes identified in Boeing Service Bulletin 737-33-1133, Revision 3, dated September 8, 2005 Installing wiring for the test system for the audio control panel lamp Boeing Service Bulletin 737-33-1121, Revision 1, dated December 19, 2002. Group 2 airplanes identified in Boeing Service Bulletin 737-33-1121, Revision 1, dated December 19, 2002 Installing splice SP896 Boeing Service Bulletin 737-26A1083, Revision 1, dated November 15, 2001. Group 39 airplanes identified in Boeing Service Bulletin 737-33-1133, Revision 3, dated September 8, 2005 Installing a smoke detection and fire extinguishing system in the cargo compartment Boeing Service Bulletin 737-26A1083, Revision 1, dated November 15, 2001. Group 59 airplanes identified in Boeing Special Attention Service Bulletin 737-33-1132, Revision 2, dated September 8, 2005 Replacing the very high frequency (VHF) and high frequency (HF) communications panels with radio control panels Boeing Service Bulletin 737-23-1102, dated June 3, 1999. Actions Accomplished per Previous Issue of Service Bulletins (h) Actions accomplished before the effective date of this AD in accordance with the service bulletins identified in Table 2 of this AD are considered acceptable for compliance with the corresponding actions specified in this AD. Table 2.—Previous Issues of Service Bulletins Service Bulletin Revision level Date Boeing Special Attention Service Bulletin 737-33-1133 Original December 19, 2002. Boeing Service Bulletin 737-33-1133 Revision 1 April 17, 2003. Boeing Service Bulletin 737-33-1133 Revision 2 December 4, 2003. Boeing Special Attention Service Bulletin 737-33-1132 Original March 20, 2003. Boeing Special Attention Service Bulletin 737-33-1132 Revision 1 March 4, 2004. Alternative Methods of Compliance (AMOCs) (i)(1) The Manager, Seattle 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 § 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 the service information identified in Table 3 of this AD to perform the actions that are required by this AD, unless the AD specifies otherwise. Table 3.—Material Incorporated by Reference Service Bulletin Revision level Date Boeing Service Bulletin 737-23-1102 Original June 3, 1999. Boeing Service Bulletin 737-26A1083 1 November 15, 2001. Boeing Service Bulletin 737-33-1121 1 December 19, 2002. Boeing Service Bulletin 737-33-1133 3 September 8, 2005. Boeing Service Bulletin 737-77-1022 1 October 26, 1989. Boeing Service Bulletin 737-77-1023 1 November 9, 1989. Boeing Special Attention Service Bulletin 737-33-1132 2 September 8, 2005. Boeing Service Bulletin 737-77-1022, Revision 1, dated October 26, 1989, contains the following effective pages:   Page No. Revision level shown on page Date shown on page 1, 3, 5-7, 10, 17, 28-55 Revision 1 Oct. 26, 1989. 2, 4, 8, 9, 11-16, 18-27 Original June 15, 1989. The Director of the Federal Register approved the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-2207, 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 July 20, 2006. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E6-12099 Filed 7-28-06; 8:45 am] BILLING CODE 4910-13-P

This AD results from a report that the master dim and test system circuit does not have wiring separation of the test ground signal for redundant equipment in the flight compartment. We are issuing this AD to prevent a single fault failure in flight from simulating a test condition and showing test patterns instead of the selected radio frequencies on the communications panels, which could inhibit communication between the flightcrew and the control tower, affecting the continued safe flight of the airplane.