As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB, THE CABIN AIR BECAME CONTAMINATED WITH SMOKE. ECS WAS SELECTED OFF AND AN EMERGENCY DECLARED. SUBSEQUENT INSPECTION FOUND EXTERNAL ENGINE OIL LEAKAGE. MFG WILL INVESTIGATE THE INCIDENT AND ADVISE OF ROOT CAUSE, ONCE DETERMINED.