As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO DEPARTURE; FLIGHT CREW REPORTED A LANDING GEAR LGCIU NR 1 FAULT AND THE LT GEAR DOOR NOT UP AND LOCKED. ATC DECLARED AN EMERGENCY WHERE THE ACFT LANDED SAFELY. MAINTENANCE DETERMINED THAT THE LGCIU REFLECTED THAT PROXIMITY SENSOR 15GA FAULTED AND REPLACED IT IAW AMM 32-31-73 & 32-69-00. LGCIU NR 1 WAS ALSO REPLACED AS A PRECAUTIONARY MEASURE IAW AMM 32-31-71. A SATISFACTORY OPS CHECK WAS ACCOMPLISHED IAW AMM 32-31-00-700-002-A.