What was found
(CAN) KING AIR 200 AIRCRAFT WAS ON CLIMB THROUGH APPROXIMATELY FL200, THE RIGHT HAND ENGINE MADE A SINGLE LOUD BANG, A FLAME WAS OBSERVED TO BE EMITTED OUT OF THE EXHAUST, FOLLOWED BY SPARKS. THE FLIGHT CREW CONDUCTED A PRECAUTIONARY ENGINE SHUTDOWN, DECLARED AN EMERGENCY WITH ATC, AND RETURNED. AME INSPECTED THE ENGINE, DURING THE INSPECTION OF THE FIRST STAGE COMPRESSOR HE FOUND A COMPRESSOR BLADE MISSING. (TC# 20190415019)