Airworthiness Directive · Amendment 39-16836 · Eurocopter Deutschland GmbH (ECD) Model MBB-BK 117 C-2 Helicopters
Eurocopter Deutschland GmbH (ECD) Model MBB-BK 117 C-2 Helicopters
Superseded. A later AD replaced this one: AD 2012-12-21. Comply with the one in force.
Model MBB-BK 117 C-2 helicopters, certificated in any category.
This amendment adopts a new airworthiness directive (AD) for ECD Model MBB-BK 117 C-2 helicopters. This action requires revising the Rotorcraft Flight Manual (RFM) by inserting certain temporary pages into the Emergency and Performance Data sections of the RFM to alert the operators to monitor the power display when a generator is deactivated and provides appropriate actions. This amendment is prompted by reports of too high a current flow when one generator is deactivated. The actions specified in this AD are intended to prevent failure of the remaining generator when one generator is deactivated, loss of electrical power, loss of systems necessary for flight safety, and subsequent loss of control of the helicopter.
To prevent failure of a generator, loss of electrical power, loss of systems necessary for flight safety, and subsequent loss of control of the helicopter, do the following:
(a) Revise the “Emergency and Malfunction Procedures” and the “Performance Data” sections of the Rotorcraft Flight Manual (RFM) BK117 C-2 by copying or cutting out temporary pages 7, 8, and 11 (RFM pages 3-3 and 3-3a for “Emergency and Malfunction Procedures” and page 5-7 for “Performance Data”) of ECD Alert Service Bulletin No. ASB MBB BK117 C-2-24A-008, dated December 20, 2010, and inserting the pages into RFM BK 117 C-2.
(b) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Contact the Manager, Safety Management Group, ATTN: George Schwab, Aviation Safety Engineer, FAA, Rotorcraft Directorate, 2601 Meacham Blvd., Fort Worth, Texas 76137, telephone (817) 222-5114, fax (817) 222-5961, for information about previously approved alternative methods of compliance.
(c) The Joint Aircraft System/Component (JASC) Code is 2435: Starter-Generator, 2437: DC Indicating System, and 2430: DC Generator System.
(d) Revise the Emergency Procedures and Performance Data sections of RFM BK 117 C-2 by inserting the specified portions of ECD Alert Service Bulletin No. ASB MBB BK117 C-2-24A-008, dated December 20, 2010, into the RFM. The Director of the Federal Register approved this incorporation by reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from American Eurocopter Corporation, 2701 Forum Drive, Grand Prairie, TX 75053-4005, telephone (800) 232-0323, fax (972) 641-3710, or at http://www.eurocopter.com. Copies may be inspected at the FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas, 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.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
