What was found
PILOT REPORTED THAT THE DEICING CREW STARTED DEICING THE AIRCRAFT BEFORE CONTACT WITH THE COCKPIT CREW. SMOKE FILLED COCKPIT AND MID-CABIN. AN ALARM WAS RECEIVED FROM THE PARTICLE SENSORS IN THE AFT AND FORWARD CARGO AREA. PILOT TURNED OFF THE APU BLEED AND ALL PROBLEMS WENT AWAY. MAINTENANCE WAS CALLED TO INSPECT THE AIRCRAFT. MAINTENANCE OPERATED THE PACK SYSTEM AND SMOKE ODOR DISSIPATED. MAINTENANCE RESET CIRCUIT BREAKERS C7 AND S22 FOR CARGO SMOKE DETECTION SYSTEM AND PERFORMED OPERATIONAL TEST OF THE SAME. NO FAULTS NOTED IN ACCORDANCE WITH AMM 26-16-710-003.