2010-11-13: Wings

2010-11-13 Empresa Brasileira de Aeronautica S.A. (EMBRAER): Amendment 39-16318. Docket No. FAA-2010-0176; Directorate Identifier 2009-NM-201-AD. Effective Date (a) This airworthiness directive (AD) becomes effective July 6, 2010. Affected ADs (b) None. Applicability (c) This AD applies to all Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170-100 LR, -100 STD, -100 SE, -100 SU, - 200 LR, -200 STD, and -200 SU airplanes; certificated in any category. Note 1: This AD requires revisions to certain operator maintenance documents to include new inspections. Compliance with these inspections is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by these inspections, the operator may not be able to accomplish the inspections described in the revisions. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance according to paragraph (h)(1) of this AD. The request should include a description of changes to the required inspections that will ensure the continued operational safety of the airplane. The FAA has provided guidance for this determination in Advisory Circular (AC) 25-1529-1A. Subject (d) Air Transport Association (ATA) of America Code 53: Fuselage; 57: Wings. Reason (e) The mandatory continuing airworthiness information (MCAI) states: During ERJ 170 airplane full scale fatigue test, cracks were found in some structural components of the airplane. Analysis of these cracks resulted in modifications on the airplane Airworthiness Limitation Items (ALI), to include new inspections tasks or modification of existing ones and its respective thresholds and intervals. Failure to inspect these components according to the new tasks, thresholds and intervals, could prevent a timely detection of fatigue cracks. Undetected fatigue cracks in these areas could adversely affect the structural integrity of these airplanes. * * * * * The corrective action is revising the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness (ICA) to incorporate new structural inspection requirements. Compliance (f) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Actions (g) Unless already done, do the following actions. (1) Within 90 days after the effective date of this AD, revise the ALS of the ICA to incorporate the inspection tasks identified in the EMBRAER temporary revisions (TRs) to Appendix A--Part 2 of the EMBRAER 170 Maintenance Review Board Report MRB-1621, listed in Table 1 of this AD. The initial compliance times for the tasks start from the applicable threshold times specified in the TRs for the corresponding tasks of the maintenance review board report or within 500 flight cycles after the effective date of this AD, whichever occurs later. For certain tasks, the compliance times depend on the pre-modification and post- modification status of the actions specified in the associated service bulletin, as specified in the "Applicability'' column of the applicable TRs identified in Table 1 of this AD. The threshold values stated in the TRs referenced in Table 1 of this AD are total flight cycles on the airplane since the date of issuance of the original Brazilian airworthiness certificate or the date of issuance of the original Brazilian export certificate of airworthiness. Table 1--Inspection Tasks TR Date Subject Task Number 53-10-012-0002 Ram air turbine compartment, support structure and cutout structure internal 53-10-012-0003 53-10-021-0005 TR 4-1 October 15, 2007 Nose landing gear wheel well metallic structure 53-10-021-0006 Wing stub spar 3 side fitting internal 57-01-012-001 Wing upper skin panels external 57-10-010-0002Fixed trailing edge lower skin panel external 57-50-002-0002 Fixed trailing edge rib 4A external 57-50-005-0003 TR 4-3 December 6, 2007 Fixed trailing edge rib 6 internal 57-50-005-0004 TR 4-4 January 18, 2008 Wing stub main box lower internal 57-01-002-003 (2) After accomplishing the actions specified in paragraph (g)(1) of this AD, no alternative inspections or inspection intervals may be used unless the inspection or inspection interval is approved by the Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, or the Ag[ecirc]ncia Nacional de Avia[ccedil][atilde]o Civil (ANAC) (or its delegated agent); or unless the inspection or interval is approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (h)(1) of this AD. Note 2: This AD differs from the MCAI and/or service information as follows: No differences. Other FAA AD Provisions (h) The following provisions alsoapply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Kenny Kaulia, Aerospace Engineer, International Branch, ANM-116, Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 227-2848; fax (425) 227-1149. Before using any approved AMOC on any airplane to which the AMOC applies, notify your principal maintenance inspector (PMI) or principal avionics inspector (PAI), as appropriate, or lacking a principal inspector, your local Flight Standards District Office. The AMOC approval letter must specifically reference this AD. (2) Airworthy Product: For any requirement in this AD to obtain corrective actions from a manufacturer or other source, use these actions if they are FAA-approved. Corrective actions are considered FAA-approved if they are approved by the State of Design Authority (or their delegated agent). You are required to assure the product is airworthy before it is returned to service. (3) Reporting Requirements: For any reporting requirement in this AD, under the provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.), the Office of Management and Budget (OMB) has approved the information collection requirements and has assigned OMB Control Number 2120-0056. Related Information (i) Refer to MCAI Brazilian Airworthiness Directive 2009-04-01, dated April 29, 2009; and the TRs to Appendix A--Part 2 of the EMBRAER 170 Maintenance Review Board Report MRB-1621, identified in Table 2 of this AD; for related information. Table 2--Temporary Revisions EMBRAER Temporary Revisions Date TR 4-1 October 15, 2007 TR 4-3 December 6, 2007 TR 4-4 January 18, 2008 Material Incorporated by Reference (j) You must use the service information contained in Table 3 of this AD to do the actions required by this AD, unless the AD specifies otherwise. (1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact Empresa Brasileira de Aeronautica S.A. (EMBRAER), Technical Publications Section (PC 060), Av. Brigadeiro Faria Lima, 2170-- Putim--12227-901 S[atilde]o Jose dos Campos--SP--BRASIL; telephone: +55 12 3927-5852 or +55 12 3309-0732; fax: +55 12 3927-7546; e-mail: distrib@embraer.com.br; Internet: http://www.flyembraer.com. (3) You may review copies of the service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington. For information on the availability of this material at the FAA, call 425-227-1221. (4) You may also review copies of the service information that is incorporated by reference 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. Table 3--Material Incorporated By Reference EMBRAER Temporary Revision Dated To 4-1 October 15, 2007 Appendix A Part 2 of the EMBRAER 170 Maintenance Review Board Report MRB-1621 4-3 December 6, 2007 Appendix A Part 2 of the EMBRAER 170 Maintenance Review Board Report MRB-1621 4-4 January 18, 2008 Appendix A Part 2 of the EMBRAER 170 Maintenance Review Board Report MRB-1621