As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR FAILED TO RAISE AFTER TAKEOFF. CONDUCTED CHECKLIST, GOT TAKEOFF WARNING HORN WHEN FLAPS WENT TO 2. WING ANTI-ICE WOULD NOT GROUND TEST, CSD OIL COOLER SWITCH AUTO WENT TO NORMAL AT ROTATION. DUMPED FUEL, NORMAL LANDING. REMOVED AND REPLACED AIR SENSING SENSOR (M831) PER MAINTENANCE MANUAL 32-00, OPERATIONAL CHECK NORMAL.