What was found
DURING TAKEOFF, THE SLATS WOULD NOT RETRACT. THE FLIGHT DUMPED FUEL AND RETURNED TO LGW. MAINTENANCE RESET THE AUTO SLAT SYSTEM AND OPERATIONAL CHECK OK.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING TAKEOFF, THE SLATS WOULD NOT RETRACT. THE FLIGHT DUMPED FUEL AND RETURNED TO LGW. MAINTENANCE RESET THE AUTO SLAT SYSTEM AND OPERATIONAL CHECK OK.