As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MSG TRAILING EDGE FLAPS DISAGREE DURING INITIAL TAXI AC RETURNED TO GATE (BTB) AND MTX GROUNDED AC . MTX PERFORMED FLAP OPERATION MULTIPLE TIMES IN ELECTRIC AND THEN HYDRAULIC AND NO FAULTS NOTED IAW AMM 27-51-00. AND RETURNED AC TO SERVICE.