CTSO-C121b Underwater Locating Devices （Acoustic） （Self-Powered）.pdf

English Translation Version for Reference Only Number:CTSO-C121b Date of approval:Jun 21 2019 CAAC Approved by:Xu Chaoqun 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. Underwater Locating Devices(Acoustic)(Self-Powered) 1.Purpose. This China Civil Aviation Technical Standard Order (CTSO)is for manufacturers applying for Underwater Locating Devices (Acoustic) (Self-Powered)CTSO authorization (CTSOA).This CTSO prescribes the minimum performance standards(MPS)that Underwater Locating Devices (Acoustic)(Self-Powered)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 21.353 of CCAR-21R4. 3.Requirements New models of Underwater Locating Devices (Acoustic) -1- English Translation Version for Reference Only CAAC CTSO-C121b (Self-Powered)identified and manufactured on or after the effective date of this CTSO must meet the MPS qualification and documentation requirements in section 3 and 4 of SAE International's Aerospace Standard (AS)8045a ...