As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - INFLIGHT DFW-YVR. CREW REPORTED LOUD SQUEAL ON VHF AND ALL FREQUENCY AND ATC WERE VERY HARD TO UNDERSTAND. EMERGENCY DECLARED FLIGHT DIVERTED PHX LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. SECURED LOOSE FLIGHT INTERPHONE JACK AT NOSE GEAR AND REPLACED NUMBER 1 VHF COMMUNICATION TRANCEIVER, FREQUENCY SELECTOR PANEL AND COMMUNICATION ANTENNA. SYSTEM GROUND CHECK NORMAL OPERATION.