Number:CTSO-C179a Date of approval:June 12 2015 CAAC Approved by:Yang Zhenmei China Civil Aviation Technical Standard Order 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 ply with when it is presented for airworthiness certification. Permanently Installed Rechargeable Lithium Cells Batteries and Battery Systems 1.Purpose. This China Civil Aviation Technical Standard Order (CTSO)is for manufacturers of permanently installed rechargeable lithium cells batteries and battery systems applying for a CTSO authorization (CTSOA).This CTSO prescribes the minimum performance standards(MPS)that permanently installed rechargeable lithium cells batteries and battery systems 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. -1- CAAC CTSO-C179a 3.Requirements. New models of permanently installed rechargeable lithium cells batteries and battery systems identified and manufactured on or after the effective date of this CTSO must meet the MPS qualification and documentation requirements in RTCA Inc.document RTCA/DO-311 Minimum Operat...