As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4219 - ON TAKEOFF, SMOKE FILLED THE CABIN. CREW REMOVED BATTERY FROM SMOKE DETECTOR TO SILENCE ALARM AND RETURNED TO THE GATE. MAINTENANCE REMOVED AND REPLACED THE ACM AND GROUND COOLING FAN. OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE. (M)