As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ARMING AUTOTHROTTLES PRIOR TO TAKEOFF, AUTOTHROTTLES DISENGAGED ON APPLICATION OF TAKEOFF POWER. ABORTED TAKEOFF @30KTS. GROUNDED - YES. LOGGED A/T F/C 22-31688 - RATE MONITOR ASM-2. ACCOMPLISHED B737-800 FIM 22-32 TASK 819. NO FAULTS. FIM STATES IT IS A NUISANCE FAULT. FAULT HISTORY SHOWED NO OTHER ASM2-RATE MONITOR FAULTS. CLEARS MEL 22-4B AND 22-99B.