What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
As the pilot started a descent, smoke started coming out of the vent at the top of the glareshield. The avionic cooling fan for the garmin 1000 avionics vents through the glareshield vent.a large amount of white smoke came out of the vent and the pilot could not see out the front window. He could see a little out of the side window. The pilot stated that it was difficult to breath. When the pilot shut off the avionic switch according to the checklist and the smoke stopped. He landed at oxc without futher incident.
As the FAA filed it
AS THE PILOT STARTED A DESCENT, SMOKE STARTED COMING OUT OF THE VENT AT THE TOP OF THE GLARESHIELD. THE AVIONIC COOLING FAN FOR THE GARMIN 1000 AVIONICS VENTS THROUGH THE GLARESHIELD VENT.A LARGE AMOUNT OF WHITE SMOKE CAME OUT OF THE VENT AND THE PILOT COULD NOT SEE OUT THE FRONT WINDOW. HE COULD SEE A LITTLE OUT OF THE SIDE WINDOW. THE PILOT STATED THAT IT WAS DIFFICULT TO BREATH.WHEN THE PILOT SHUT OFF THE AVIONIC SWITCH ACCORDING TO THE CHECKLIST AND THE SMOKE STOPPED.HE LANDED AT OXC WITHOUT FUTHER INCIDENT.