As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NUMBER ONE COMM WENT INOP AND WAS FOLLOWED BY AN ELECTRICAL TYPE SMELL. THE TEMPERATURE IN THE COCKPIT WAS VERY WARM WHILE THE CABIN WAS VERY COLD. *S/D* REPLACED NUMBER 1 VHF TRANSCEIVER AND NUMBER 1 AUDIO CONTROL PANEL. ELECTRICAL SMELL WAS UNRELATED TO COMMUNICATION PROBLEM AND WAS CAUSED BY RUPTURED LT PACK ACM OUTLET DUCT.