As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 873 - CLT-TYS - ON APPROACH TO TRI MAIN GEAR DOORS OPENED BUT GEAR DID NOT EXTEND. FLIGHT RETURNED TO CLT. CAPTAIN USED THE ALTERNATE EXTEND METHOD AND GEARS EXTENDED NORMALLY BY FREEFALL. AN EMERGENCY WAS DECLARED AS A PRECAUTION. FLIGHT LANDED NORMALLY WITHOUT FURTHER INCIDENT. (M)