What was found
AIR TURNBACK. DURING CLIMBOUT OF DEN L/E TRANSIT LIGHT ILLUMINATED. NR 6 L/E SLAT DID NOT MOVE WHEN FLAPS RETRACTED. NO ROLL NOTED. REMOVED AND REPLACED L/E DEVICE CONTROL VALVE PER MM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIR TURNBACK. DURING CLIMBOUT OF DEN L/E TRANSIT LIGHT ILLUMINATED. NR 6 L/E SLAT DID NOT MOVE WHEN FLAPS RETRACTED. NO ROLL NOTED. REMOVED AND REPLACED L/E DEVICE CONTROL VALVE PER MM.