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蓄电池应急电源装置(BEPU) (英文).pdf22页

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English Translation Version for Reference Only Number:CTSO-C174 Date of approval:Apr 17, 2017 Approved by:Yang Zhenmei China Civil Aviation Technical Standard Order - 1 - This China Civil Aviation Technical Standard Order (CTSO) is issued according to Part 37 of the China Civil Aviation Regulations (CCAR-37). Each CTSO is a criterion which the concerned aeronautical materials, parts or appliances used on civil aircraft must comply with when it is presented for airworthiness certification. Battery Based Emergency Power Unit (BEPU) 1. Purpose. This China Civil Aviation Technical Standard Order (CTSO) is for manufacturers applying for battery based emergency power units (BEPU) CTSO authorization (CTSOA). This CTSO prescribes the minimum performance standards(MPS) that BEPU must first meet for approval and identification with the applicable CTSO marking. 2. Applicability. This CTSO affects new application submitted after its effective date. Major design changes to article approved under this CTSO will require a new authorization in accordance with section 21.310 of CCAR-21R3. 3. Requirements. New models of BEPUs identified and manufactured on or after the effective date of this CTSO must meet the requirements in this CTSO, English Translation Version for Reference Only CAAC CTSO-C174 - 2 - including appendixes 1, 2 and 3. The battery used in the BEPU must meet the requirements of CTSO-C173a, Nickel-Cadmium and Lead Acid Batteries, dated July 24, 2014, or any other battery standards approved by the authorities. a. Functionality. This CTSO MPS applies to BEPUs used to provide emergency backup electrical power for, but not limited to, instrument systems, navigation systems, egress lighting, and other emergency or standby electrical power applications on an aircraft. b. Failure Condition Classification. Failure of the function defined in paragraph 3.a of this CTSO is a hazardous failure. Develop the BEPU system to, at least, the design assurance level equal to this failure condition classification. c. Environmental Qualification. Test the BEPU according to appendix 2 of this CTSO. d. Software Qualification. If the article includes software, develop the software according to RTCA, Inc. document RTCA/DO-178B, Software Considerations in Airborne Systems and Equipment Certification, dated December 1, 1992. The RTCA/DO-178B software level should be consistent with the failure condition classification in paragraph 3.b above. In accordance with RTCA/DO-178B, paragraph 9.3, submit the following documents to the authorities for review and approval:
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