As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER THE LH ENGINE WAS STARTED, THERE WAS FUMES AND A LIGHT HAZE THROUGHOUT THE CABIN AND COCKPIT. THE PLANE WAS DEBOARDED AND NO MEDICAL ATTENTION WAS REQUIRED. THE FUMES AND SMOKE WENT AWAY AFTER THE ENGINES WERE SHUT DOWN. / SYSTEM IS DEFERRED AND WILL REQUIRED A SUPPLEMENTAL SUBMISSION.