AD 2006-23-15 Airworthiness Directives; Boeing Model 757 Airplanes

Models named: 757-200, -200PF, -200CB, -300 series, 2004 757-200, -200CB series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Model 757-200, -200PF, -200CB, and -300 series airplanes, certificated in any category; as identified in the applicable service bulletin or bulletins in Table 1 of this AD. Table 1.—Boeing Service Bulletins Boeing Alert Service Bulletin Revision Date Model 757-27A0146 Original October 14, 2004 757-200, -200PF, and -200CB series airplanes. 757-27A0147 Original October 14, 2004 757-300 series airplanes. 757-57A0058 1 January 10, 2002 757-200, -200PF, and -200CB series 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. Installations (f) Within 24 months after the effective date of this AD, do the actions in paragraphs (f)(1) and (f)(2) of this AD, as applicable. (1) For all airplanes: Install a control wheel damper assembly at the first officer's drum bracket assembly and aileron quadrant beneath the flight deck floor in section 41; and do all applicable functional and operational tests and adjustments of the new installation, and all applicable related investigative/corrective actions before further flight after the installation. Do all actions in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 757-27A0146, dated October 14, 2004 (for Model 757-200, -200PF, and -200CB series airplanes); or Boeing Alert Service Bulletin 757-27A0147, dated October 14, 2004 (for Model 757-300 series airplanes). Where Boeing Alert Service Bulletin 757-27A0146 specifies to contact Boeing if a just-installed (new) wheel damper does not function properly, correct that condition in accordance with the procedures in paragraph (i) of this AD. (2) For Model 757-200, -200PF, and -200CB series airplanes: Install vortex generators (vortilons) on the leading edge of the outboard main flap in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 757-57A0058, Revision 1, dated January 10, 2002. Actions Accomplished in Accordance With Previous Revision of Service Bulletin (g) Actions done before the effective date of this AD in accordance with Boeing Special Attention Service Bulletin 757-57-0058, dated March 9, 2000, are acceptable for compliance with the actions in paragraph (f)(2) of this AD. No Reporting Required (h) Although the Accomplishment Instructions of Boeing Alert Service Bulletin 757-27A0146 and Boeing Alert Service Bulletin 757-27A0147, both dated October 14, 2004, describe procedures for submitting a sheet recording accomplishment of the service bulletin, this AD does not require that action. Alternative Methods of Compliance (AMOCs) (i)(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) 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 in Table 2 of this AD 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 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. Table 2.—Material Incorporated by Reference Boeing Alert Service Bulletin Revision level Date 757-27A0146 Original October 14, 2004. 757-27A0147 Original October 14, 2004. 757-57A0058 1 January 10, 2002. Issued in Renton, Washington, on October 31, 2006. Kalene C. Yanamura, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E6-19164 Filed 11-15-06; 8:45 am] BILLING CODE 4910-13-P

This AD results from several reports that flightcrews experienced unintended roll oscillations during final approach, just before landing. We are issuing this AD to prevent unintended roll oscillations near touchdown, which could result in loss of directional control of the airplane, and consequent airplane damage and/or injury to flightcrew and passengers.