AD 2005-22-08 Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135BJ, -135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP Airplanes

Models named: EMB-135BJ, -135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to EMBRAER Model EMB-135BJ, -135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP airplanes; as identified in EMBRAER Service Bulletin 145-30-0028, Revision 10, dated March 22, 2005; 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. Modification (f) Within 180 days after the effective date of this AD: Modify the TAT sensor heating system in accordance with the Accomplishment Instructions of EMBRAER Service Bulletin 145-30-0028, Revision 10, dated March 22, 2005. Modifications Done According to Previous Revisions of the Service Bulletin (g) Actions done before the effective date of this AD are acceptable for compliance with the corresponding requirements of this AD as specified in paragraphs (g)(1) and (g)(2) of this AD. (1) Modifications in accordance with EMBRAER Service Bulletin 145-30-0028, Revision 09, dated March 1, 2004, are acceptable for compliance with paragraph (f) of this AD. (2) Modifications in accordance with the revisions of the service bulletin in Table 1 of this AD are acceptable for compliance with the corresponding action in this AD, provided that the additional actions specified in PART III of the Accomplishment Instructions of EMBRAER Service Bulletin 145-30-0028, Revision 09, dated March 1, 2004, or Revision 10, dated March 22, 2005, are accomplished within the compliance time required by paragraph (f) of this AD. Table 1.—Previous Revisions of the Service Bulletin EMBRAER Service Bulletin Revision Date 145-30-0028 04 March 13, 2001. 145-30-0028 05 May 24, 2001. 145-30-0028 06 September 26, 2001. 145-30-0028 07 April 10, 2003. 145-30-0028 08 August 20, 2003. Credit for Replacement of FADEC Assemblies (h) Replacing the existing FADEC assemblies with new or modified FADEC assemblies that include software version 7.6 or 8.0, in accordance with the Accomplishment Instructions of the applicable service bulletin listed in Table 2 of this AD, is acceptable for compliance with paragraph (f) of this AD. If the FADEC assemblies are replaced with new or modified assemblies as specified in this paragraph, all applicable engine indication and crew alerting system (EICAS), central maintenance computer (CMC), and IC-600 upgrades; as well as any other applicable actions associated with upgrading the EICAS, CMC, or IC-600; must also be done, as specified in the section of the service bulletin identified in the “Paragraph Where Upgrades are Identified” column of Table 2 of this AD. Table 2.—Service Bulletins for Upgrading FADEC Assemblies For EMBRAER Model— EMBRAER Service Bulletin Revision Date Paragraph where upgrades are identified EMB-135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, -145EP 145-73-0021 Original July 23, 2004 1.C., “Description—Time for Accomplishment”. EMB-135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, -145EP 145-73-0022 01 July 15, 2004 1.C., “Description—Time for Accomplishment”. EMB-135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, -145EP 145-73-0023 Original June 28, 2004 1.C., “Description—Time for Accomplishment”. EMB-135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, -145EP 145-73-0024 01 July 15, 2004 1.C., Description—Time for Accomplishment”. EMB-135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, -145EP 145-73-0025 Original July 23, 2004 1.C., “Description—Time for Accomplishment”. EMB-135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, -145EP 145-73-0027 Original March 15, 2005 1.B., “Concurrent Requirements”. EMB-135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, -145EP 145-73-0028 Original March 15, 2005 1.B., “Concurrent Requirements”. EMB-135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, -145EP 145-73-0029 Original May 4, 2005 1.B., “Concurrent Requirements”. EMB-135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, -145EP 145-73-0029 01 June 27, 2005 1.B., “Concurrent Requirements”. EMB-135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, -145EP 145-73-0030 Original May 5, 2005 1.B., “Concurrent Requirements”. EMB-135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, -145EP 145-73-0031 Original May 5, 2005 1.B., “Concurrent Requirements”. EMB-135BJ 145LEG-73-0003 01 July 15, 2004 1.C., “Description—Time for Accomplishment”. EMB-135BJ 145LEG-73-0004 02 October 6, 2004 1.C., “Description—Time for Accomplishment”. EMB-135BJ 145LEG-73-0005 Original June 7, 2005 1.D., “Description”. EMB-135BJ 145LEG-73-0006 Original March 8, 2005 1.B., “Concurrent Requirements”. EMB-145XR 145-73-0026 Original June 28, 2004 1.C., “Description—Time for Accomplishment”. Alternative Methods of Compliance (AMOCs) (i)(1) The Manager, International Branch, 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 14 CFR 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 (j) Brazilian airworthiness directive 2004-01-02R2, dated November 29, 2004, also addresses the subject of this AD. Material Incorporated by Reference (k) You must use EMBRAER Service Bulletin 145-30-0028, Revision 10, dated March 22, 2005, 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. Issued in Renton, Washington, on October 18, 2005. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-21310 Filed 10-25-05; 8:45 am] BILLING CODE 4910-13-P

This AD was prompted by a report indicating that the fully automated digital electronic control (FADEC) unit failed to compensate for ice accretion on the engine fan blades due to a false temperature signal from the total air temperature (TAT) sensor to the FADEC. We are issuing this AD to prevent failure of the TAT sensor, which could result in insufficient thrust to take off or (if coupled with the loss of an engine during takeoff) to abort the takeoff in a safe manner, and consequent reduced controllability of the airplane.