AD 2006-07-01 Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 Airplanes and Model EMB-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; certificated in any category; as identified in EMBRAER Service Bulletin 145-27-0106, Revision 02 (for all affected airplanes except Model EMB-135BJ airplanes); and EMBRAER Service Bulletin 145LEG-27-0016, Revision 02 (for Model EMB-135BJ airplanes only); both dated March 14, 2005.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Replacement (f) Within 18 months or 4,000 flight hours after the effective date of this AD, whichever occurs first, replace the HSCU with a modified and reidentified or new, improved HSCU having part number 362100-1013, by doing all the actions specified in the Accomplishment Instructions of the applicable EMBRAER service bulletin specified in Table 1 of this AD. Actions accomplished using the alternative sources of service information shown in Table 2 of this AD are considered acceptable for compliance with the requirements of this paragraph. Doing the requirements of this paragraph before the compliance time specified in paragraph (b) of AD 2004-25-21 eliminates the requirement to accomplish the actions required by paragraph (b)(1) of AD 2004-25-21. Table 1.—Service Information EMBRAER service bulletin Revision level Dated 145-27-0106 02 March 14, 2005. 145LEG-27-0016 02 March 14, 2005. Table 2.—Alternative Service Information EMBRAER service bulletin Revision level Dated 145-27-0084 06 March 14, 2005. 145LEG-27-0002 02 August 24, 2005. Airplanes Identified in Certain Other Service Bulletins/Concurrent Requirements (g) For airplanes identified in the EMBRAER service bulletins listed in Table 3 of this AD: Prior to or concurrently with the actions required by paragraph (f) of this AD, replace the HSCU with a new HSCU with improved features, and having a new part number, in accordance with EMBRAER Service Bulletin 145LEG-27-0002, Revision 01, dated April 15, 2003; or 145-27-0084, Revision 04, dated October 21, 2003; as applicable. Accomplishing this replacement eliminates the requirement to accomplish all actions required by paragraphs (a)(1), (a)(2), (b)(2), (b)(3), (b)(4)(i), (b)(4)(ii), (b)(5), (b)(6), and (b)(7) of AD 2004-25-21. Table 3.—Identification of Affected Airplanes EMBRAER service bulletin Paragraph Revision level Dated 145-27-0084 1.A.(1), 1.A.(2), 1.A.(3), 1.A.(4), and 1.A.(5) 04 October 21, 2003. 145-27-0096 1.A.(1) and 1.A.(2) 04 March 14, 2005. 145-27-0106 1.A. 02 March 14, 2005. 145LEG-27-0002 1.A.(1) and 1.A.(2) 01 April 15, 2003. 145LEG-27-0016 1.A. 02 March 14, 2005. Actions Accomplished Per Previous Issues of Service Bulletins (h) Actions accomplished before the effective date of this AD in accordance with the EMBRAER service bulletins listed in Table 4 of this AD are considered acceptable for compliance with the applicable action in this AD. Table 4.—Previous Issues of EMBRAER Service Bulletins EMBRAER service bulletin Revision level Dated 145-27-0084 05 August 24, 2004. 145-27-0106 Original August 4, 2004. 145-27-0106 01 August 30, 2004. 145LEG-27-0016 Original August 4, 2004. 145LEG-27-0016 01 August 30, 2004. Parts Installation (i) As of the effective date of this AD, no person may install an HSCU on any airplane unless it has been modified according to the requirements of this AD. Alternative Methods of Compliance (AMOCs) (j)(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 (k) Brazilian airworthiness directive 2004-11-01, dated November 28, 2004, also addresses the subject of this AD. Material Incorporated by Reference (l) You must use the service information specified in Table 5 of this AD, as applicable, to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approves the incorporation by reference of these documents 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 copies of this service information. You may view 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 5.—Material Incorporated by Reference EMBRAER service bulletin Page No. Revision level shown on page Date shown on page 145-27-0084, Revision 04, October 21, 2003 1-4, 6, 11, 12, 15 04 October 21, 2003.   5, 7-10, 13, 14, 16-40 03 145-27-0106, Revision 02, March 14, 2005 1-11 02 March 14, 2005. 145LEG-27-0002, Revision 01, April 15, 2003 1, 5 01 April 15, 2003.   2-4, 6-15 Original February 5, 2003. 145LEG-27-0016, Revision 02, March 14, 2005 1-11 02 March 14, 2005. Issued in Renton, Washington, on March 17, 2006. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 06-2853 Filed 3-24-06; 8:45 am] BILLING CODE 4910-13-P

This AD was prompted by reports of loss of the pitch trim system due to a simultaneous failure of both channels of the horizontal stabilizer control unit (HSCU). We are issuing this AD to prevent loss of pitch trim and reduced controllability of the airplane.