As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: #2 ENGINE THRUST REVERSER UNLOCK EICAS DURING TAKEOFF POWER APPLICATION, LOW SPEED REJECT LESS THAN 40 KNOTS IAS. MAINTENANCE PERFORMED. TSM 78-3100-810-864-A THRUST REVERSER INDICATION FAILURE. FOUND ALL BLOCKER DOORS FLUSH WITH FAN COWL. BLOCKER DOORS CANNOT BE PULLED FROM STOWED POSITION BY HAND. OPERATIONAL CHECKED THRUST REVERSER ON CHANNEL A & B NO FAULTS FOUND. OK FOR SERVICE.