As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLUNK SOUND HEARD JUST BEFORE TOUCHDOWN FOLLOWED BY LOUD BANGING NOISE DURING TAXI. INSPECTED GROUND CONNECTOR P0040 FOUND UNSERVICEABLE. REMOVED AND REPLACED CONNECTOR IAW EMB SPWM 20-50-00 AND EMB 32-63-05. OPERATIONAL CHECK GOOD, RETURNED AIRCRAFT TO SERVICE.