What was found
AFTER GEAR UP SELECTION, AND ALREADY IN A RIGHT TURN, TO FOLLOW THE DEPARTURE ROUTE, WE EXPERIENCED AN ABNORMAL YAW TO THE RIGHT FOR 1 SECOND AND THEN BACK TO NORMAL. WE EXPECTED A BIRDSTRIKE. NORMAL FLIGHT AND NORMAL LANDING. AFTER LANDING I PERFORMED AN IMMEDIATE INSPECTION AFTER DISEMBARKING OF THE PAX, AND FOUND THE RT ENGINE UPPER COWLING MISSING. PAX DIDN’T REALIZE ANYTHING. FURTHER FLIGHT WAS CANCELLED.