As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/EWR - FLT 7538 - DURING TAKEOFF, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO FLAPS WOULD NOT RETRACT AFTER TAKEOFF. FLAPS WENT TO 25 DEGREES AFTER LANDING WITH FLAP SELECTOR IN THE UP POSITION. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND RESET EMERGENCY SELECT BUTTON, OPS CHECK OK. AIRCRAFT RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)