As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACV - CAPTAINS AUDIO PANEL COMM NR 1 AND COMM NR 2 TRANSMIT LIGHT 'TX' REMAINS ON. AIRCRAFT RETURNED TO STATION. MAINTENANCE FOUND MIC STUCK IN TRANSMIT. REPLACED HAND MIC. OPERATIONAL CHECK SATISFACTORY. AIRCRAFT RETURNED TO SERVICE. (M)