AD 2011-05-08 Airworthiness Directives; Turbomeca Model Arriel 1E2, 1S, and 1S1 Turboshaft Engines

This AD applies to Turbomeca Arriel 1E2, 1S, and 1S1 turboshaft engines that have incorporated Turbomeca Service Bulletin (SB) No. 292 73 0826, Version A, dated October 13, 2009, or incorporated Turbomeca Internal Consign No. 298468. These engines are installed on, but not limited to, Eurocopter Deutschland MBB BK117-C2 and BK117-C1, and Sikorsky S-76A series and S-76C series, helicopters. Reason (d) This AD was prompted by three reports of incorrectly assembled low-pressure fuel system ejectors; with one of them resulting in an uncommanded engine in-flight shutdown. We are issuing this AD to prevent uncommanded engine in-flight shutdown of one or both engines in a two-engine helicopter and an emergency autorotation landing or accident.

Comply with this AD within the compliance times specified, unless already done. Fuel Ejector Inspection (f) Inspect the fuel ejector in the body of the fuel ejector assembly for proper installation by checking that the circlip is properly seated in its groove. Use Paragraph 2.B of the Instructions to be Incorporated, of Turbomeca Mandatory Service Bulletin (MSB) No. A292 73 0834, Version B, dated February 8, 2011 to do the inspection. Inspect at the following compliance times: (1) For helicopters having at least one of the two affected engines experiencing starting difficulties, inspect within 5 flight hours (FH) after receipt of emergency AD 2011-05-51 or after the effective date of this AD, whichever occurs first. (2) For helicopters having only one affected engine, and experiencing starting difficulties in that engine, inspect within 20 FH after receipt of emergency AD 2011-05-51 or after the effective date of this AD, whichever occurs first. (3) For helicopters having one or two affected engines and experiencing no starting difficulties, inspect within 100 FH after the effective date of this AD. Inspection Results (g) If you find a fuel ejector improperly installed in the body of the fuel ejector assembly, replace the fuel ejector assembly before further flight with a serviceable fuel ejector assembly. Definition (h) For the purpose of this AD, starting difficulties occur when N1 stagnation or variations are encountered. During starting, N1 rise shall be continuous and linear up to ground idle. Credit for Actions Accomplished in Accordance With Previous Service Information (i) Inspections and replacements done using Turbomeca MSB No. A292 73 0834, Version A, dated February 4, 2011, or Turbomeca SB No. 292 73 0826, Version B, dated February 4, 2011, before the effective date of this AD, satisfy the requirements of this AD. Alternative Methods of Compliance (AMOCs) (j) The Manager, Engine Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Related Information (k) For further information about this AD, contact: Rose Len, Aerospace Engineer, Engine Certification Office, FAA, 12 New England Executive Park, Burlington, MA 01803; phone: (781) 238-7772; fax: (781) 238-7199; e-mail: rose.len@faa.gov . (l) For copies of the service information referenced in this AD, contact: Turbomeca, 40220 Tarnos, France; phone: 33 559 74 40 00; fax: 33 559 74 45 15; Web site: http://www.turbomeca-support.com . You may review copies of the referenced service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803. (m) EASA AD No. 2011-0023-E, dated February 9, 2011 (corrected on February 10, 2011), also pertains to this AD. Material Incorporated by Reference (n) You must use Turbomeca Mandatory Service Bulletin No. A292 73 0834, Version B, dated February 8, 2011, 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 Turbomeca, 40220 Tarnos, France; phone: 33 559 74 40 00; fax: 33 559 74 45 15; Web site: http://www.turbomeca-support.com . (3) You may review copies at the FAA, New England Region, 12 New England Executive Park, Burlington, MA; 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/cfr/ibr-locations.html . Issued in Burlington, Massachusetts, on February 22, 2011. Peter A. White, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 2011-4832 Filed 3-3-11; 8:45 am] BILLING CODE 4910-13-P

Comply with this AD within the compliance times specified, unless already done. Fuel Ejector Inspection (f) Inspect the fuel ejector in the body of the fuel ejector assembly for proper installation by checking that the circlip is properly seated in its groove. Use Paragraph 2.B of the Instructions to be Incorporated, of Turbomeca Mandatory Service Bulletin (MSB) No. A292 73 0834, Version B, dated February 8, 2011 to do the inspection. Inspect at the following compliance times: (1) For helicopters having at least one of the two affected engines experiencing starting difficulties, inspect within 5 flight hours (FH) after receipt of emergency AD 2011-05-51 or after the effective date of this AD, whichever occurs first. (2) For helicopters having only one affected engine, and experiencing starting difficulties in that engine, inspect within 20 FH after receipt of emergency AD 2011-05-51 or after the effective date of this AD, whichever occurs first. (3) For helicopters having one or two affected engines and experiencing no starting difficulties, inspect within 100 FH after the effective date of this AD. Inspection Results (g) If you find a fuel ejector improperly installed in the body of the fuel ejector assembly, replace the fuel ejector assembly before further flight with a serviceable fuel ejector assembly. Definition (h) For the purpose of this AD, starting difficulties occur when N1 stagnation or variations are encountered. During starting, N1 rise shall be continuous and linear up to ground idle. Credit for Actions Accomplished in Accordance With Previous Service Information (i) Inspections and replacements done using Turbomeca MSB No. A292 73 0834, Version A, dated February 4, 2011, or Turbomeca SB No. 292 73 0826, Version B, dated February 4, 2011, before the effective date of this AD, satisfy the requirements of this AD. Alternative Methods of Compliance (AMOCs) (j) The Manager, Engine Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Related Information (k) For further information about this AD, contact: Rose Len, Aerospace Engineer, Engine Certification Office, FAA, 12 New England Executive Park, Burlington, MA 01803; phone: (781) 238-7772; fax: (781) 238-7199; e-mail: rose.len@faa.gov . (l) For copies of the service information referenced in this AD, contact: Turbomeca, 40220 Tarnos, France; phone: 33 559 74 40 00; fax: 33 559 74 45 15; Web site: http://www.turbomeca-support.com . You may review copies of the referenced service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803. (m) EASA AD No. 2011-0023-E, dated February 9, 2011 (corrected on February 10, 2011), also pertains to this AD. Material Incorporated by Reference (n) You must use Turbomeca Mandatory Service Bulletin No. A292 73 0834, Version B, dated February 8, 2011, 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 Turbomeca, 40220 Tarnos, France; phone: 33 559 74 40 00; fax: 33 559 74 45 15; Web site: http://www.turbomeca-support.com . (3) You may review copies at the FAA, New England Region, 12 New England Executive Park, Burlington, MA; 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/cfr/ibr-locations.html . Issued in Burlington, Massachusetts, on February 22, 2011. Peter A. White, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. 2011-4832 Filed 3-3-11; 8:45 am] BILLING CODE 4910-13-P