As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - FL1246 - ON CLIMB-OUT OF MIA, AIRCRAFT HAD A COMPLETE RADIO FAILURE WHEN THE GEAR WAS RAISED. ONLY THE ACARS COMM WAS WORKING. FLIGHT RETURNED TO FIELD AT MIA. ON APPROACH, BOTH RADIOS CAME BACK TO LIFE. AIRCRAFT TAXIED TO THE GATE WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE ACARS MGMT UNIT. OPERATIONAL CHECK GOOD. (M)