As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLAPS DRIVE EICAS, RTFL. FOUND LEFT OUTBOARD FLAP POSITION TRANSMITTER GIVING ERRATIC READINGS. REPLACED LEFT O/B FLAP RVDT TRANSMITTER REF MM27-58-01-401. OPS NORMAL, NO CMC OR STATUS MESSAGES THRU OUT FULL FLAP MOVEMENT. ALL POSITION RVDT'S READINGS WITHIN TOLERANCE REF MM27-51-00 PG 3 TABLE 1.