As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: CREW DECLARED AN EMERGENCY INTO ORD ON ACCOUNT OF FLAP DISAGREE INDICATION. MAINTENANCE TROUBLESHOT IAW FIM 27-51-00 FOR MSG 27-52259. REPLACED L FLAP POSITION TRANSMITTER IAW AMM 27-58-01. OPS CHECKS ARE NORMAL.