AD 2011-08-09 Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120, -120ER, -120FC, -120QC, and -120RT Airplanes

Models named: EMB-120, -120ER, -120FC, -120QC, -120RT. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to all Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120, -120ER, -120FC, -120QC, and -120RT airplanes, certificated in any category.

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) Within 600 flight hours or 180 days after the effective date of this AD, whichever occurs first, with at least 400 kg (882 lb) of fuel in each tank, determine the real fuel quantity in each tank using the dripless measuring sticks, in accordance with Subjects 28-41-00, Fuel Quantity Indicating System, and 28-42-00, Fuel Quantity Measuring Sticks Assembly—Description and Operation, of Chapter 28, Fuel, of the EMBRAER EMB120 Brasilia AMM, MM-120/1459, Revision 27, dated September 28, 2010; or in accordance with Task 28-25, Operational Check Fuel Quantity Indicating System (Measuring Sticks), specified in Section 3, Systems and Powerplant Inspection Requirements, in EMBRAER EMB120 Models Maintenance Review Board Report (MRBR), MRB-HI-200, Revision 26, dated January 5, 2010. Before further flight, compare the results of the fuel quantity measurement with the fuel master indicator and repeater indicator readings for each tank and do the applicable action in paragraph (g)(1), (g)(2), or (g)(3) of this AD. (1) If the difference of the two measurements is greater than 60 kg (132 lb) on both tanks, before further flight do all applicable corrective actions including correcting the fuel quantity indication system (FQIS), in accordance with Subjects 28-41-00, Fuel Quantity Indicating System, and 28-42-00, Fuel Quantity Measuring Sticks Assembly—Description and Operation, of Chapter 28, Fuel, of the EMBRAER EMB120 Brasilia AMM, MM-120/1459, Revision 27, dated September 28, 2010. (2) If the difference of the two measurements is greater than 60 kg (132 lb) on only one tank, and the conditions in paragraphs (g)(2)(i), (g)(2)(ii), and (g)(2)(iii) of this AD are met, do all applicable corrective actions including correcting the FQIS, in accordance with Subjects 28-41-00, Fuel Quantity Indicating System, and 28-42-00, Fuel Quantity Measuring Sticks Assembly—Description and Operation, of Chapter 28, Fuel, of the EMBRAER EMB120 Brasilia AMM, MM-120/1459, Revision 27, dated September 28, 2010, within 10 days after determining the real fuel quantity as specified in paragraph (g) of this AD. (i) Before further flight after each refueling, the actions required in paragraph (g) of this AD are done; (ii) Both fuel flow indicators are operating properly; and (iii) The fuel used or fuel remaining function of the totalizer is operating properly. (3) If the difference of the two measurements is greater than 60 kg (132 lb) on only one tank, and any condition in paragraph (g)(2)(i), (g)(2)(ii), or (g)(2)(iii) of this AD is not met, before further flight do all applicable corrective actions including correcting the FQIS, in accordance with Subjects 28-41-00, Fuel Quantity Indicating System, and 28-42-00, Fuel Quantity Measuring Sticks Assembly—Description and Operation, of Chapter 28, Fuel, of the EMBRAER EMB120 Brasilia AMM, MM-120/1459, Revision 27, dated September 28, 2010. (h) Repeat the actions required in paragraph (g) of this AD thereafter at intervals not to exceed 600 flight hours or 180 days, whichever occurs first. Credit for Actions Accomplished in Accordance With Previous Service Information (i) Inspections accomplished before the effective date of this AD according to Subjects 28-41-00, Fuel Quantity Indicating System, and 28-42-00, Fuel Quantity Measuring Sticks Assembly—Description and Operation, of Chapter 28, Fuel, the EMBRAER EMB120 Brasilia Aircraft Maintenance Manual, MM-120/1459, Revision 24, dated March 30, 2009; Revision 25, dated September 28, 2009; and Revision 26, dated March 29, 2010; are considered acceptable for compliance with the corresponding actions specified in this AD. FAA AD Differences Note 1: This AD differs from the MCAI and/or service information as follows: This AD requires doing all applicable corrective actions in accordance with Subjects 28-41-00, Fuel Quantity Indicating System, and 28-42-00, Fuel Quantity Measuring Sticks Assembly—Description and Operation, of Chapter 28, Fuel, of the EMBRAER EMB120 Brasilia AMM, MM-120/1459, Revision 27, dated September 28, 2010. Corrective actions include replacing the measuring stick and its relevant magnetic float, replacing the master fuel quantity indicator, and replacing the repeater indicator, as applicable; inspecting defective tank units for contamination, corrosion and integrity of components, and repairing or replacing as necessary; inspecting system wiring from the connector at the wing root to the master indicator for condition and continuity; and correcting the fuel quantity indication system; as applicable. The MCAI does not provide a corrective action and only requires a repetitive functional check of the FQIS in accordance with Subject 28-42-00, Fuel Quantity Measuring Sticks Assembly—Description and Operation, of Chapter 28, Fuel, of the EMBRAER EMB120 Brasilia Aircraft Maintenance Manual, Revision 24, dated March 30, 2009. This difference has been coordinated with Agência Nacional de Aviação Civil (ANAC). Other FAA AD Provisions (j) The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Branch, ANM-116, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the International Branch, send it to ATTN: Todd Thompson, Aerospace Engineer, International Branch, ANM-116, Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 227-1175; fax (425) 227-1149. Information may be e-mailed to: 9-ANM-116-AMOC-REQUESTS@faa.gov. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding 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. Related Information (k) Refer to MCAI Brazilian Airworthiness Directive 2009-07-04, effective July 13, 2009; Task 28-25, Operational Check Fuel Quantity Indicating System (Measuring Sticks), specified in Section 3, Systems and Powerplant Inspection Requirements, in EMBRAER EMB120 Models Maintenance Review Board Report (MRBR), MRB-HI-200, Revision 26, dated January 5, 2010; and Subjects 28-41-00, Fuel Quantity Indicating System, and 28-42-00, Fuel Quantity Measuring Sticks Assembly—Description and Operation, of Chapter 28, Fuel, of the EMBRAER EMB120 Brasilia AMM, MM-120/1459, Revision 27, dated September 28, 2010; for related information. Material Incorporated by Reference (l) You must use Subjects 28-41-00, Fuel Quantity Indicating System, and 28-42-00, Fuel Quantity Measuring Sticks Assembly—Description and Operation, of Chapter 28, Fuel, of the EMBRAER EMB120 Brasilia AMM, MM-120/1459, Revision 27, dated September 28, 2010; or Task 28-25, Operational Check Fuel Quantity Indicating System (Measuring Sticks), specified in Section 3, Systems and Powerplant Inspection Requirements, in EMBRAER EMB120 Models Maintenance Review Board Report (MRBR), MRB-HI-200, Revision 26, dated January 5, 2010; as applicable; to do the actions required by this AD, unless the AD specifies otherwise. The revision level of EMBRAER EMB120 Brasilia Aircraft Maintenance Manual, MM-120/1459, Revision 27, dated September 28, 2010, is indicated only on the title page and Chapter 28 List of Effective Pages of that document. The revision level of EMBRAER EMB120 Brasilia Maintenance Review Board Report, MRB-HI-200, Revision 26, dated January 5, 2010, is indicated only on the title page of that document; pages I-II of the List of Effective Pages of that document do not exist. (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 São 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. Issued in Renton, Washington, on March 25, 2011. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2011-15369 Filed 6-24-11; 8:45 am] BILLING CODE 4910-13-P