As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHEN THE CREW APPLIED TAKEOFF THRUST THERE WAS A PUFF OF SMOKE IN THE COCKPIT AND THE CABIN. THRUST WAS REDUCED AT LESS THAN 10KTS AND THE SMOKE DISSIPATED. NO EMERGENCY WAS DECLARED AND THE FLIGHT RETURNED TO THE GATE FOR INVESTIGATION. BOTH RECIRC FILTERS REPLACED IAW AMM 21-24-02-000-810A. ENG RUN CARRIED OUT IAW TASK 21-20-00-810-803A. NO FURTHER ODOR.