What was found
CLT - FLT 1123 EN ROUTE, PIT TO CLT, AFTER TAKEOFF, A "GEAR DOORS" EICAS MESSAGE APPEARED WITH THE GEAR HANDLE UP. ALSO, RECEIVED A "DOORS" AMBER LIGHT. THE "GEAR" AMBER LIGHT AND ALL GREEN DOWN LIGHTS EXTINGUISHED. CREW CYCLED THE GEAR AND ALL INDICATIONS WENT TO NORMAL. FLIGHT CONTINUED AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE PERFORMED SEVERAL GEAR SWINGS. NO FAULTS FOUND. OK FOR SERVICE.