What was found
ACFT DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE. LANDING GEAR DOORS DID NOT CLOSE. ACFT LANDED SAFELY. R & R NR 1 LANDING GEAR CIU IAW AMM 32-31-71-PB401, PERFORMED BITE TEST ON MCDU IAW AMM 32-69-00-740-001A, OPS CHECKS NORMAL AND R & R LANDING GEAR CIU IAW AMM 32-31-71-PB401, PERFORMED BITE TEST ON MCDU IAW AMM 32-69-00-740-001-A, OPS CHECK NORMAL. ACCEPTANCE FLIGHT AFTERWARDS WAS SUCCESSFUL.