As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INITIAL TAKEOFF ROLL (MAX SPEED 60 KNOTS) FLIGHT CREW OBSERVED NR 1 ENGINE THRUST REVERSER UNLOCK LIGHT. FLIGHT CREW ELECTED TO DISCONTINUE TAKEOFF. AIRCRAFT RETURNED TO GATE. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE PERSONNEL ADJUSTED LEFT OUTBOARD LOWER ACTUATOR LOCK SWITCH PER MM 789-32-00. GROUND RUN ENGINE. AIRCRAFT RETURNED TO SERVICE. (M)