What was found
AFTER TAKEOFF AND CLIMBOUT FROM XNA, THE FLIGHT CREW RECEIVED A NUMBER 2 ENGINE THRUST REVERSER UNLOCKED MESSAGE AND THE N1 REV ICON APPEARED. THE FLIGHT CREW REDUCED POWER ON NUMBER TWO ENGINE AND ACCOMPLISHED MEMORY ITEMS. THE FLIGHT CREW DECLARED AN EMERGENCY AND RETURNED VFR TO XNA. AN OTHERWISE UNEVENTFUL APPROACH AND LANDING WAS MADE. CONTRACT MAINTENANCE CONFIRMED THAT THE REVERSER WAS UNLOCKED. MAINTENANCE STOWED, PINNED AND DEFERRED THE THRUST REVERSER. AIRCRAFT DEPARTED AND RETURNED TO DTW.