2006-06-09: Horizontal stabilizer actuator

2006-06-09 Empresa Brasileira de Aeronautica S.A. (EMBRAER): Amendment 39-14518. Docket No. FAA-2005-23475; Directorate Identifier 2005-NM-117-AD. Effective Date (a) This AD becomes effective April 26, 2006. Affected ADs (b) None. Applicability (c) This AD applies to all EMBRAER Model ERJ 170-100 LR, -100 STD, -100 SE, and -100 SU airplanes, certificated in any category. Unsafe Condition (d) This AD results from safety assessments of the aileron and flap/slat flight controls system, conducted after the type certification of the airplane, which showed that some dormant faults did not comply with the safety assessment criteria. We are issuing this AD to prevent failure of the aileron and flap/slat controls system, which could result in reduced controllability of the airplane. Compliance (e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Airplane Maintenance Manual (AMM) Revisions (f) Within 30 days after the effective date of this AD: Revise the Airworthiness Limitations section of the Instructions for Continued Airworthiness in the EMBRAER 170 AMM to include revisions to the maintenance tasks and repetitive inspections intervals, and applicable corrective actions that are approved by either the Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA; or the Departmento de Aviacao Civil (DAC), (or its delegated agent). The revisions in paragraphs (f)(1) and (f)(2) of this AD are approved methods. (1) EMBRAER Temporary Revision (TR) 1-3 of the EMBRAER 170 Maintenance Review Board (MRB) Report MRB-1621, dated December 27, 2004, to the EMBRAER 170 AMM includes revised repetitive inspection intervals for MRB tasks 27-11-00-002 (Operational Check of Control- Yoke Disconnect System) and 27-11-11-001 (Operational Check of Aileron Override Unit). Where the revision requires a compliance time that is less than 700 flight hours after the effective date of this AD, do the action within 700 flight hours after the effective date of this AD. Thereafter, except as provided by paragraph (h) of this AD, no alternative inspection intervals may be approved. (2) The revised EMBRAER 170 AMM maintenance tasks identified in Table 1 of this AD include new maintenance tasks and inspections related to the incorporation of a new horizontal stabilizer actuator. Thereafter, except as provided by paragraph (h) of this AD, no alternative tasks or inspections may be approved. Table 1.--EMBRAER 170 AMM Maintenance Tasks AMM chapter Task Nos. Date Title 27 11 03 27 11 03 710 801 A, 27 11 03 720 801 A January 25, 2005 Aileron Control Cable Ajustment/Test. 27 41 01 27 41 01 210 801 A, 27 41 01 220 801 A, 27 41 01 220 802 A. January 25, 2005 Horizontal Stabilizer Trim Actuator Inspection/Check. 27 81 01 27 81 01 710 801 A January 25, 2005 Slat Actuator Adjustment/Test. Alternative Methods of Compliance (AMOCs) (g)(1) The Manager, ANM-116, Transport Airplane Directorate, 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 Sec. 39.19 on any airplane to which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office. Related Information (h) Brazilian airworthiness directive 2005-03-02, effective April 20, 2005, also addresses the subject of this AD. Material Incorporated by Reference (i) You must use EMBRAER Temporary Revision 1-3 of the EMBRAER 170 Maintenance Review Board Report MRB-1621, dated December 27, 2004, to the EMBRAER 170 Airplane Maintenance Manual, 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 Empresa Brasileira de Aeronautica S.A. (EMBRAER), P.O. Box 343--CEP 12.225, Sao Jose dos Campos--SP, Brazil, 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.