AD 2004-10-05 Airworthiness Directives; Boeing Model 747-400, 747-400D, 747-400F, 757-200, 757-200PF, 757-200CB, 767-200, 767-300, and 767-300F Series Airplanes

Airplanes as listed in Table 1 of this AD, certificated in any category. Table 1 of this AD follows: Table 1—Applicability Airplane Model— As Listed in Boeing Service Bulletin— 747-400, 747-400D, 747-400F series airplanes Boeing Alert Service Bulletin 747-34A2460, Revision 2, dated June 14, 2001. 757-200, 757-200PF, 757-200CB series airplanes Boeing Service Bulletin 757-34A0222, Revision 1, dated July 17, 2003. 767-200, 767-300, and 767-300F series airplanes Boeing Service Bulletin 767-34A0332, Revision 1, dated April 24, 2003.

Required as indicated, unless accomplished previously. To ensure that the flightcrew is able to silence an erroneous overspeed or stall aural warning, accomplish the following: Compliance Times (a) Except as provided by paragraph (a)(3) of this AD, do the actions specified in either paragraph (a)(1) or (a)(2) of this AD at the times specified in paragraphs (a)(1) and (a)(2) of this AD, as applicable. (1) Within 24 months after the effective date of this AD, do the actions specified in paragraph (c) of this AD. (2) Within 18 months after the effective date of this AD, do the actions in paragraph (b) of this AD; and within 72 months after the effective date of this AD, do the actions specified in paragraph (c) of this AD; except as provided by paragraph (a)(3) of this AD. (3) Model 747-400, -400D, and -400F series airplanes equipped with three air data computers (ADCs) are required to accomplish paragraph (a)(1) of this AD. Optional Interim Action (b) Change the termination of the wires and perform an operational test, according to the Accomplishment Instructions of Boeing Special Attention Service Bulletin 747-31-2313, Revision 1, dated September 26, 2002 (for Model 747-400, -400D, and -400F series airplanes); Boeing Special Attention Service Bulletin 757-31-0068, Revision 1, dated August 29, 2002 (for Model 757-200, -200CB, and -200PF series airplanes); and Boeing Special Attention Service Bulletin 767-31-0149, Revision 1, dated November 7, 2002 (for Model 767-200, -300, and -300F series airplanes); as applicable. Modification of Air Data Computer (ADC) System (c) Modify the ADC system, as specified in paragraph (c)(1), (c)(2), or (c)(3) of this AD, as applicable. (1) For Model 747-400, -400D, and -400F series airplanes: Re-route wires associated with ADC overspeed warnings, replace the P1-1 and P3-1 module assemblies in the flight deck with improved module assemblies, install various wires in and between the flight deck and main equipment center of the airplane, and perform a test of the source select module and a system functional test, according to the Accomplishment Instructions of Boeing Alert Service Bulletin 747-34A2460, Revision 2, dated June 14, 2001. Note 1: Boeing Service Bulletin 747-34A2460, Revision 2, refers to Boeing Component Service Bulletins 233U2200-31-01 and 233U2205-31-01, both dated April 20, 1995, as additional sources for instructions to change the ADC computer source select switch on the P1-1 and P3-1 panels, respectively. (2) For Model 757-200, -200PF, and -200CB series airplanes: Install a circuit breaker and replace an existing lightplate assembly with a new, improved lightplate assembly in the flight compartment; install two relays and remove a certain relay in the main equipment center; make various wiring changes in the flight compartment and main equipment center; and perform tests of the flight data acquisition unit, flight data recorder system, and stall and overspeed warnings. Do these actions according to the Accomplishment Instructions of Boeing Service Bulletin 757-34A0222, Revision 1, dated July 17, 2003. (3) For Model 767-200, -300, and -300F series airplanes: Modify the air data switching system and do a system functional test, according to the Accomplishment Instructions of Boeing Service Bulletin 767-34A0332, Revision 1, dated April 24, 2003. Actions Required To Be Accomplished Prior to or Concurrently With Paragraph (c) of This AD (d) Prior to or concurrently with accomplishment of paragraph (c) of this AD, accomplish paragraph (d)(1) or (d)(2) of this AD, as applicable. (1) For Boeing Model 747-400, -400D, and -400F series airplanes: Do the actions specified in Table 2 of this AD, as applicable. Table 2 of this AD follows: Table 2.—Boeing Model 747-400, -400D, and -400F Series Airplanes—Prior/Concurrent Actions For airplanes listed in— Accomplish all actions associated with— According to the Accomplishment Instructions of— Boeing Service Bulletin 747-31-2179, dated May 26, 1994. Replacing the three Electronic Flight Information System (EFIS)/Engine Indicating and Crew Alerting System (EICAS) interface units (EIU) in the main equipment center with improved EIUs and installing new software in six integrated display units (IDU) and three EIUs Boeing Service Bulletin 747-31-2179, dated May 26, 1994. Boeing Service Bulletin 747-31-2180, dated March 17, 1994 Replacing the three EIUs in the main equipment center with improved EIUs and installing new software in six IDUs and three EIUs Boeing Service Bulletin 747-31-2180, dated March 17, 1994. Boeing Service Bulletin 747-31-2217, dated May 19, 1994 Installing new software in six IDUs and three EIUs Boeing Service Bulletin 747-31-2217, dated May 19, 1994. Boeing Service Bulletins 747-31-2217, dated May 19, 1994; and 747-31-2178, dated July 1, 1993 Replacing three EIUs with improved EIUs and installing new software in six IDUs and three EIUs Boeing Service Bulletin 747-31-2178, dated July 1, 1993. Boeing Service Bulletins 747-31-2217, dated May 19, 1994; and 747-45-2005, dated February 8, 1990 Replacing certain central maintenance computers (CMCs) with improved CMCs, modifying related wiring, and modifying the data loader control panel Boeing Service Bulletin 747-45-2005, dated February 8, 1990. Boeing Service Bulletins 747-31-2217, dated May 19, 1994; and 747-45-2010, dated December 17, 1992 Installing new software in the CMC Boeing Service Bulletin 747-45-2010, dated December 17, 1992. Boeing Service Bulletins 747-31-2217, dated May 19, 1994; and 747-31-2163, dated February 14, 1991 Installing new software in six IDUs and three EIUs Boeing Service Bulletin 747-31-2163, dated February 14, 1991. Replacement of EICAS Computers (2) For airplanes listed in Table 1 of this AD that are also identified in any of the service bulletins listed in Table 3 of this AD: Prior to or concurrently with accomplishment of the actions required by paragraph (c) of this AD, accomplish all actions associated with replacing the existing EICAS computers with improved EICAS computers, according to the Accomplishment Instructions of the applicable service bulletin specified in Table 3 of this AD. The actions include performing an EICAS readout comparison to ensure that the applicable software is used; replacing the existing EICAS computers with new, improved EICAS computers that can be upgraded with certain software; and making related wiring changes. Table 3 of this AD follows: Table 3.—Service Bulletins for Replacement of EICAS Computers Boeing Service Bulletin (all including Appendices A, B, and C)— Service bulletin revision level— Service bulletin date— 757-31-0059 Revision 3 March 29, 2001. 767-31-0091 Revision 3 April 27, 2000. 767-31-0098 Revision 2 October 21, 1999. 767-31-0099 Revision 3 February 8, 2001. 767-31-0100 Revision 2 July 29, 1999. 767-31-0101 Original July 6, 2000. Parts Installation (e) As of the effective date of this AD, no person may install, on any airplane, a part having a part number listed in the “Existing Part Number” column of the table under paragraph 2.E. of Boeing Alert Service Bulletins 757-31-0059, Revision 3, dated March 29, 2001; 767-31-0091, Revision 3, dated April 27, 2000; 767-31-0098, Revision 2, dated October 21, 1999; 767-31-0099, Revision 3, dated February 8, 2001; 767-31-0100, Revision 2, dated July 29, 1999; or 767-31-0101, dated July 6, 2000; or under paragraph II.D. of Boeing Service Bulletins 747-31-2163, dated February 14, 1991; 747-31-2178, dated July 1, 1993; 747-31-2179, dated May 26, 1994; 747-31-2180, dated March 17, 1994; 747-45-2005, dated February 8, 1990; or 747-45-2010, dated December 17, 1992. Operator's “Equivalent Procedure” (f) Where Boeing Alert Service Bulletin 747-34A2460, Revision 2, dated June 14, 2001; and Boeing Service Bulletin 757-34A0222, Revision 1, dated July 17, 2003; specify that certain actions may be accomplished per an operator's “equivalent procedure”: These actions must be accomplished per the chapter of the applicable Boeing 747 or 757 Airplane Maintenance Manual specified in the applicable service bulletin. An operator's “equivalent procedure” cannot be used unless the operator receives FAA approval for that procedure according to paragraph (h) of this AD. Actions Accomplished Per Previous Issue of Service Bulletins (g) Actions accomplished before the effective date of this AD per Boeing Alert Service Bulletin 757-34A0222, dated March 28, 2002; and Boeing Alert Service Bulletin 767-34A0332, dated January 10, 2002; are considered acceptable for compliance with the corresponding actions specified in this AD. Alternative Methods of Compliance (h) In accordance with 14 CFR 39.19, the Manager, Seattle Aircraft Certification Office, FAA, is authorized to approve alternative methods of compliance for this AD. Incorporation by Reference (i) Unless otherwise specified in this AD, the actions shall be done in accordance with the service information included in Table 4, as follows: Table 4.—Service Bulletins Incorporated by Reference Boeing Service Bulletins Revision Date Alert Service Bulletin 747-34A2460 2 June 14, 2001. Service Bulletin 747-31-2163 Original February 14, 1991. Service Bulletin 747-31-2178 Original July 1, 1993. Service Bulletin 747-31-2179 Original May 26, 1994. Service Bulletin 747-31-2180 Original March 17, 1994. Service Bulletin 747-31-2217 Original May 19, 1994. Service Bulletin 747-45-2005 Original February 8, 1990. Service Bulletin 747-45-2010 Original December 17, 1992. Service Bulletin 757-31-0059, including Appendices A, B, and C 3 March 29, 2001. Service Bulletin 757-34A0222 1 July 17, 2003. Service Bulletin 767-31-0091, including Appendices A, B, and C 3 April 27, 2000. Service Bulletin 767-31-0098, including Appendices A, B, and C 2 October 21, 1999. Service Bulletin 767-31-0099, including Appendices A, B, and C 3 February 8, 2001. Service Bulletin 767-31-0100, including Appendices A, B, and C 2 July 29, 1999. Service Bulletin 767-31-0101, including Appendices A, B, and C Original July 6, 2000. Service Bulletin 767-34A0332 1 April 24, 2003. Special Attention Service Bulletin 747-31-2313 1 September 26, 2002. Special Attention Service Bulletin 757-31-0068 1 August 29, 2002. Special Attention Service Bulletin 767-31-0149 1 November 7, 2002. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-2207. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html . Effective Date (j) This amendment becomes effective on June 22, 2004 Issued in Renton, Washington, on May 5, 2004. Ali Bahrami, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 04-10907 Filed 5-17-04; 8:45 am] BILLING CODE 4910-13-P