As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CHS//CLT---CO4006, CREW REPORTED LANDING GEAR AIR/GROUND INDICATION FAILURE AFTER TAKEOFF FROM CHS. AIRCRAFT AIR RETURNED TO CHARLESTON (CHS). AIRCRAFT MAINTENANCE FERRIED TO CHARLOTTE (CLT). MAINTENANCE PERFORMED LANDING GEAR EXTENSION AND RETRACTION IAW EMB145 AMM 32-30-00, TESTED LANDING GEAR PROXIMITY SWITCHES IAW EMB145 AMM#32-63-05. NO DEFECTS FOUND LANDING GEAR OPERATION NORMAL. (AIRCRAFT RETURNED TO SERVICE)