As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT 450 OPERATING 3771 FROM ORD TO TYS RECIEVED A GEAR DISAGREE. THEY HAD 18 PASSENGERS ON BOARD. C/W QRH AND DECLARED AN EMERGENCY. GEAR WAS COMMANDED DOWN. GEAR EXTENDED AND ALL LIGHTS SHOWED GREEN FOR DOWN AND LOCKED. AIRCRAFT REMOVED FROM SERVICE. REPLACED NLG UPLOCK SENSOR PS3GA, PER AMM 32-30. SWUNG GEAR MULTIPLE TIMES, PER AMM 32-30. CHECKS GOOD. PLACARDS REMOVED. CLEARS MEL 32-30-01.