AD 2007-25-18 Airworthiness Directives; Boeing Model 747-400 and 747-400D Series Airplanes

Models named: 747-400, 747-400D series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Boeing Model 747-400 and 747-400D series airplanes, certificated in any category; as identified in Boeing Special Attention Service Bulletin 747-53-2498, dated December 19, 2006.

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, Installation, and Replacement (f) Within 36 months after the effective date of this AD, do the applicable actions required by paragraphs (f)(1) and (f)(2) of this AD by doing all the actions in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 747-53-2498, dated December 19, 2006. (1) For Group 1 airplanes, as identified in the service bulletin: Modify the stowage bin ladder of zone E, install new right and left intercostals, and remove existing tie rods and install new tie rods. (2) For Group 2 airplanes, as identified in the service bulletin: Modify the lateral shear beam. Alternative Methods of Compliance (AMOCs) (g)(1) The Manager, Seattle Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested, in accordance with the procedures found in 14 CFR 39.19. (2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. Material Incorporated by Reference (h) You must use Boeing Special Attention Service Bulletin 747-53-2498, dated December 19, 2006, 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 Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-2207, for a copy of this service information. You may review copies 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/cfr/ibr-locations.html . Issued in Renton, Washington, on November 30, 2007. Stephen P. Boyd, Assistant Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7-23851 Filed 12-7-07; 8:45 am] BILLING CODE 4910-13-P

This AD results from a report indicating that the overhead lateral shear beam aft of main entry door number 5 reacts to certain loads. We are issuing this AD to prevent detachment of the center stowage bins of zone E at forward load levels less than 9g during an emergency landing, which could cause injury to passengers and/or crew and could impede subsequent rapid evacuation.