What was found
SMOKE IN CABIN AND COCKPIT WHEN BLEED AIR SOURCE SWITCHED FROM ENGINES TO APU. SECURED AND DEFERRED THE APU PER MEL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
SMOKE IN CABIN AND COCKPIT WHEN BLEED AIR SOURCE SWITCHED FROM ENGINES TO APU. SECURED AND DEFERRED THE APU PER MEL.