As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: CREW DECLARED AN EMERGENCY INTO DCA ON ACCOUNT OF VHF RADIO UNABLE TO TRANSMIT. MAINTENANCE REMOVED AND REPLACED F/O PTT SWITCH IAW AMM 27-92-41. OPS CHECK GOOD. FOUND CONTROL PANEL SWITCH FLOPPING AROUND. REMOVED & REPLACED F/O'S ACP DUE TO CONDITION IAW AMM 23-51-12 CHECKS OK.