What was found
DURING APPLICATION OF TAKEOFF THRUST WITH FLAPS 5 AND STABILIZER TRIM AT 2.7, AURAL WARNING HORN SOUNDED, ABORTED TAKEOFF. VERIFIED FLIGHT CONTROL CONFIGURATION, NO DISCREPANCIES NOTED. PERFORMED STATIC RUN AND AURAL WARNING SOUNDED AGAIN, RETURNED TO THE GATE. MAINTENANCE ADJUSTED UPPER STABILIZER TRIM WARNING SWITCH S532. OPERATIONAL CHECK NORMAL.