As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN FREON A/C SYSTEM SWITCHED OFF FOR ENGINE START, SMOKE WAS OBSERVED COMING FROM THE AIR INTAKE ON NOSE COMPARTMENT. FOUND SMOKE TO BE COMING FROM OVERHEATED COMPRESSOR MOTOR. SYSTEM DEACTIVATED AND PLACED ON DEFERRED MAINTENANCE LIST.