As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER T/O FLAPS WOULD NOT RETRACT- FOLLOWED QRH -RECYCLED NO HELP - RETURNED TO DEPARTURE. REPLACED LT FLAP PCU HIGH SPEED VALVE IAW MM 27-54-33-4. OPS CKD FLAP SEVERAL TIMES. OPS CKD GOOD. INSPECTED BOTH FSCC'S. NO FAULTS NOTED. CLOSED TDR RESULTS= CONFIRMED EXTERNAL LEAKS.