What was found
UPON ENGINE START, SMOKE APPEARED IN THE CABIN. REMOVED AND REPLACED CARBON SEAL, PRESSURIZING AIR REGULATING VALVE ON THE ENGINE, AND ECU.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
UPON ENGINE START, SMOKE APPEARED IN THE CABIN. REMOVED AND REPLACED CARBON SEAL, PRESSURIZING AIR REGULATING VALVE ON THE ENGINE, AND ECU.