As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 4403, CREW REPORTED SMOKE IN COCKPIT AND CABIN AT TAKEOFF ROLL AND INITIAL CLIMBOUT. DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE. LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. PERFORMED TROUBLESHOOTING & DISCREPANCY ISOLATED TO NR 1 ACM. REMOVED AND REPLACED CONDENSER/MIXER IAW AMM 21-51-04. OPS CHECKED GOOD IAW AMM 21-51-00. AIRCRAFT RETURNED TO SERVICE.