As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ROTATION, THE CABIN & COCKPIT FILLED WITH WHITE SMOKE. TURNED OFF PACKS, SMOKE STOPPED, LANDED UNPRESSURIZED. DID NOT DECLARE AN EMERGENCY, SUSPECT DE-ICE FLUID IN APU INTAKE. CYCLED PACKS ON AND OFF 5 TIMES FOR 10 MINUTES EACH WITH APU BLEED AIR. ALSO RAN PACKS WITH ENGINE BLEED AIR DURING TAXI IN REF TO AMM 21-50-00. OPS CHECK OK WITH NO SMOKE PRESENT AT THIS TIME.