As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO THROTTLE SWITCH WOULD NOT STAY ARMED DURING TAKEOFF ROLL. DURING CLIMB WITH AUTO THROTTLE ARMED, NR 1 N1=94.7, NR 2 N1= 91.5 AT FL290. PERFORMED AUTO THROTTLE BITE AND RANGE CHECK ON FMS. NO FAULTS NOTED. OK FOR SERVICE PER MM 22-30-01.