As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: THE FLAPS DID NOT EXTEND PAST 5, THIS IS THE THIRD CONSECUTIVE TIME THAT THIS ISSUE HAPPENED. AIRCRAFT EMERGENCY LANDED INTO ORD SAFELY. ACCOPLISHED FLAP POSITION TRANSMITTER DISAGREE PROBLEM FAULT ISOLATION, PER TSM 27-51-00-810-813. REMOVED AND REPLACED FSEU UNIT, PER AMM 27-51-01-400-801. ALL SYSTEM OPS CHECK NORMAL.