As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER T/O, SMOKE WAS DETECTED IN AFT LAV AND SMOKE DET WENT OFF. CABIN FILLED WITH SMOKE. PER CK LIST EVENTUALLY NR 2 PACK OVHT LIGHT CAME ON. UNLATCHED PACK, SMOKE STARTED TO CLEAR. REPLACED NR 2 PACK TEMP CONT, RAN ALL ENG TO T/O PWR WITH ALL THREE PACKS, NO SMOKE. NR 2 PACK CKS OK.