What was found
FLIGHT DECK FILLED WITH SMOKE DURING PRE-FLIGHT INSPECTIONS, APU WAS OPERATING, NO PASSENGERS ON BOARD. DEFERRED APU PER MEL 49-00-1.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT DECK FILLED WITH SMOKE DURING PRE-FLIGHT INSPECTIONS, APU WAS OPERATING, NO PASSENGERS ON BOARD. DEFERRED APU PER MEL 49-00-1.