What was found
UNDER VFR CONDITIONS ON A VISUAL APPROACH, THE FIRST OFFICER WAS HAND FLYING. AT APPROXIMATELY 1500FT AN AURAL TRIM RUNAWAY WARNING WAS ANNOUNCED FOLLOWED BY A MASTER WARNING PITCH TRIM RUNAWAY THAT WAS ILLUMINATED ON THE CAS SCREEN. THE GEAR WAS DOWN AND FLAPS WERE SET AT 15 PRIOR TO THE WARNING. THE CAPTAIN SWITCHED THE TRIM INTERRUPT SWITCH AND TOOK OVER CONTROLS. ELECTED TO LAND THE AIRCRAFT AND FORGO THE QRH UNTIL ON THE GROUND. AN EMERGENCY WAS NOT DECLARED.