As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT PACK BLOWS HOT AIR AND SETS OFF LAV SMOKE DETECTOR WITH PROMINENT PACK BURNING ODOR. RAN BOTH ENGINES WITH RT PACK ON. FOUND LAV SMOKE DETECTOR NOT GOING OFF. RAN APU WITH THE RT PACK ON. FOUND THAT THE APU BLEEDS SMOKE INTO THE CABIN. SUPPLEMENTAL REPORT FORTHCOMING.