As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE FROM PACKS ON APU. APU TRIPPED OFF BUSSES. FIRE HANDLE PULLED; BOTTLE DISCHARGED. ACRID SMELL IN COCKPIT + THROUGHOUT CABIN. HAZE VISIBLE FROM FORWARD. CABIN. / [01] PERFORMED APU GENERATOR OPS AND LEAK CHECK PER AMM 49-41-21. OPS CHECK GOOD.