As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF BELOW 80 KNOTS LEFT ENGINE REVERSE CAUTION ILLUMINATED, AND LEFT REVERSE ISOLATION VALVE MSG. THEN DURING TAXI-IN, THERE WAS A IDLE DISAGREE MESSAGE DISPLAY. ASSIGNED CI 78-19 MEL 78-31-1 LEFT T/R LOCKED IN THE FWD THRUST POSITION. PER DDG REMAINED OPENED.