473 SC1: check at site probe and propeller normal, also inspection wiring cable measure voltage result bad condition  from color black & white replace color chocolate & white result normal. 473 SC2 check at site found propeller detached. Ask stop motor from CCR and install propeller test function result speed failure normal when start motor from CCR ( JAJAT & RIZAL & ADI & ANDRI & EVE INDY & DADANG )