As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A AFTER BLOCK OUT C/P FILLED WITH GREY SMOKE. CREW DONNED OXYGEN MASKS AVIONICS SMOKE AND MAIN CARGO DECK SMOKE WARNING RECEIVED. *S/D* PERFORMED MM 21-51-00-3 USED APU AIR FIRST AND HAD SMELL OF SKYDROL CYCLE THROUGH CHECK UNTIL SMELL WAS GONE. REMOVED AND REPLACED WATER SEPARATOR COALESER PER MM 21-51-16-3 THEN USED ENG BLEED AIR TO COMPLETE MM 27-51-00-3.