What was found
EXHAUST BROKE OFF DURING TAKEOFF ROLL CAUSING THE EXHAUST GASES TO BURN THE LOWER COWLING AND BURN INTO THE CABIN HEAT AIR INLET WHICH ALLOWED THE SMOKE INTO THE CABIN.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
EXHAUST BROKE OFF DURING TAKEOFF ROLL CAUSING THE EXHAUST GASES TO BURN THE LOWER COWLING AND BURN INTO THE CABIN HEAT AIR INLET WHICH ALLOWED THE SMOKE INTO THE CABIN.