As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON START OF TAKEOFF ROLL A/S LESS THAN 60KTS TAKEOFF CONFIG WARNING LIGHT EICAS FLAP CONFIG. FLAP INDICATION 15 FLAP HANDLE 15 IN DETENT. RAN TAKEOFF CONFIG TEST. FAILED FLAP PORTION. REPLACED CARD M620. RAN ANOTHER TAKEOFF WARNING TEST. ALL TESTS NORMAL.