As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SHORTLY AFTER TAKEOFF THERE WAS A STRONG ACRID ODOR IN THE COCKPIT AND THE PASSENGER CABIN. THE FLIGHT CREW REPORTED VERY THIN VISIBLE SMOKE AND A TEMPERATURE RISE IN THE COCKPIT AS WELL. THE FLIGHT RETURNED AND LANDED. NR 1 AIR CYCLE MACHINE REPLACED IAW AMM 21-52-21.