As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING DESCENT, COMMUNICATIONS WERE LOST. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED WITHOUT INCIDENT. THE FIRST OFFICER'S AUDIO SELECTOR PANEL WAS SUSPECT. A HOT MIKE SITUATION WAS APPARENT IN VHF 1 AND VHF 2. THE AUDIO SELECTOR PANEL WAS REPLACED IAW MM 23-20-00 AND CHECKED SERVICEABLE. NO FURTHER INCIDENT DURING SUBSEQUENT FLIGHT.