What was found
DECLARED INFLIGHT EMERGENCY, SMOKE IN COCKPIT. SOURCE OF SMOKE WAS BELIEVED TO BE AIR CONDITIONING SYSTEM. NOTICED A DIRTY SOCK ODOR DURING TAXI. IN FLIGHT, THE SMOKE KEPT INCREASING, RETURNED TO BASE. USED EMERGENCY ESCAPE SLIDE TO EGRESS ON RUNWAY. FIRE DEPARTMENT ACCIDENTLY DEPLOYED THE OTHER ESCAPE SLIDE. FOUND NR 1 PACK ANTI ICE VALVE LEAKING INSTALLED NR 1 PACK ANTI ICE VALVE PER MD11 M.M. 21-53-27-2 OK FOR SERVICE PERFORMED PER MD11 MM 21-53-00-7 PARA 2 CLEANING AIR CONDITIONING PACK AND DISTRIBUTION APPROX 5 TIMES NO SMOKE AND NO OIL ODOR AT THIS TIME