CTSO-C137a Aircraft Portable Megaphones.pdf

English Translation Version for Reference Only Number:CTSO-C137a Date of approval:Jan 14 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. Aircraft Portable Megaphones 1.Purpose. This China Civil Aviation Technical Standard Order (CTSO)is for manufacturers applying for aircraft portable megaphones CTSO authorization (CTSOA).This CTSO prescribes the minimum performance standards(MPS)that aircraft portable megaphones 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-21-R4. 3.Requirements New models of aircraft portable megaphones identified and manufactured on or after the effective date of this CTSO must meet the -1- English Translation Version for Reference Only CAAC CTSO-C137a MPS qualification and documentation requirements in SAE International's Aerospace Standard (AS)4950B Design and Performance Criteria for Transport Aircraft Portable Megaphones dated March 2007 as modified by appe...