As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT REPORTED WHILE DOING PRE-FLIGHT CHECKS ALL AVIONICS UNSERVICEABLE, EXCEPT FOR UNS GPS, AND INTERPHONE. NO RADIOS. FOUND REU TO BE AT FAULT AND ODOR COMING FROM IT. REPLACED REU, SYSTEMS CHECKED SERVICEABLE AND ACFT RETURNED TO SERVICE. REU TO BE SENT OUT FOR REPAIR AND REPORT TO BE REVIEWED.