What was found
DURING BOARDING, THE APU FAILED, FIRE BOTTLES WERE FIRED AND CABIN FILLED WITH SMOKE. REPLACED APU, WATER SEPARATOR BAGS AND PURGED PACKS.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING BOARDING, THE APU FAILED, FIRE BOTTLES WERE FIRED AND CABIN FILLED WITH SMOKE. REPLACED APU, WATER SEPARATOR BAGS AND PURGED PACKS.