What was found
DURING TAXI, THE PILOT REPORTED A COM 1 MIC STUCK. COM SINGLE PTT STUCK, DUE THAT SITUATION, RETURNED TO THE GATE. MAINTENANCE PERFORMED AN OPERATIONAL TEST TO THE AUDIO MANAGEMENT IAW AMM 23-51-00-710-001-A, THE PTT FOR THE CAPTAIN AND FIRST OFFICER FOUND WORKING NORMAL. THE AIRCRAFT WAS RETURNED TO SERVICE.