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: UNABLE TO RETRACT FLAPS FROM 1 TO UP. AIRCRAFT RETURN TO AND LANDED SAFELY AT DFW WITHOUT FURTHER INCIDENT. REMOVE AND REPLACE LEFT FLAP POSITION TRANSMITTER. ALL TEST PASSED. PER AMM 27-58-01.