As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT REVERSER ISOLATION VALVE MESSAGE CAME ON DURING START OF T/O ROLL. FWD LEFT THRUST REVERSER TO MCO AND PLACARD PER MEL 78-31-01 M PROC COMPLIED WITH TROUBLE SHOOTING PER FIM. NO TROUBLE FOUND. NO MESSAGES ON THRUST REVERSER RELAY MODULE. OPERATED THRUST REVERSER SEVERAL TIMES UNDER ENGINE POWER. OPS CHECKS NORMAL. MCO/PLACARD REMOVED.