2005-12-08: Engine Electronic Control Unit (EECU)

Adoption of the Amendment Under the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows: PART 39--AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. Sec. 39.13 [Amended] 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive: 2005-12-08 Turbomeca S.A.: Amendment 39-14124. Docket No. FAA-2005- 21443; Directorate Identifier 2005-NE-08-AD. Effective Date (a) This airworthiness directive (AD) becomes effective June 29, 2005. Affected ADs (b) None. Applicability (c) This AD applies to Turbomeca S.A. Arrius 2 B1, 2 B1A, 2 B1A- 1, and 2 B2 turboshaft engines. These engines are installed on, but not limited to, Eurocopter Deutschland GmbH EC 135 T1 and EC 135 T2 helicopters. Unsafe Condition (d) This AD results from a report of simultaneous loss of automatic control of both engines of a Eurocopter Deutschland EC 135 helicopter during flight. We are issuing this AD to prevent simultaneous loss of automatic control of both engines and subsequent loss of control of the helicopter. Compliance (e) You are responsible for having the actions required by this AD performed within 90 days after the effective date of this AD, unless the actions have already been done. Onetime Upgrade of Engine Electronic Control Unit (EECU) Software (f) Simultaneously, on both engines of the helicopter, perform a onetime upgrade of EECU software as follows: (1) Either replace the EECU; or (2) Upload the EECU software. (3) Use paragraph 2 of the applicable Turbomeca Mandatory Service Bulletin (MSB) listed in Table 1 of this AD, to do the onetime upgrade. Table 1.--Applicable MSBs For Use Arrius 2 B1 engines with EECUs that have incorporated ModificationTU 19C. MSB No. 319 73 2080, Update No. 1, dated February 13, 2004. Arrius 2 B1 engines with EECUs that have incorporated Modification TU 67C or TU 23C. MSB No. 319 73 2081, Update No. 1, dated February 13, 2004. Arrius 2 B1A and 2 B1A 1 engines. MSB No. 319 73 2082, Update No. 1, dated February 13, 2004. Arrius 2 B2 engines . MSB No. 319 73 2090, dated February 13, 2004. Alternative Methods of Compliance (g) The Manager, Engine Certification Office, has the authority to approve alternative methods of compliance for this AD if requested using the procedures found in 14 CFR 39.19. Material Incorporated by Reference (h) You must use the Turbomeca Mandatory Service Bulletins specified in Table 2 of this AD to perform the software upgrade required by this AD. The Director of the Federal Register approved the incorporation by reference of the documents listed in Table 2 of this AD in accordance with 5 U.S.C. 552(a)and 1 CFR part 51. Contact Turbomeca S.A., 40220 Tarnos, France; telephone 33 05 59 74 40 00, fax 33 05 59 74 45 15, 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., Nassif Building, Room PL-401, Washington, DC 20590-0001, 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 NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html . Table 2.--Incorporation by Reference Mandatory service bulletin No. Page Revision Date 319 73 2080 Total Pages 6 ALL 1 February 13, 2004. 319 73 2081 Total Pages 6 ALL 1 February 13, 2004. 319 73 2082 Total Pages 6 ALL 1 February 13, 2004. 319 73 2090 Total Pages 7 ALL Original February 13, 2004.Related Information (i) DGAC airworthiness directive F-2004-017 R1, dated March 3, 2004, also addresses the subject of this AD.