What was found
PHL FLT 734 PHL TO MAN. ON TAKEOFF AND LANDING GEAR RETRACTION, THE NOSE GEAR DOORS DID NOT CLOSE. THE CREW RECYCLED THE GEAR AND THE DOORS INDICATED PROPERLY CLOSED. DUE TO THE FOLLOW ON MAINTENANCE ACTION REQUIRED UPON LANDING IN MAN, AN OPERATIONAL DECISION WAS MADE TO RETURN TO PHL THE FLIGHT RETURNED TO PHL AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE PERFORMED SEVERAL GEAR SWINGS AND COULD NOT DUPLICATE THE PROBLEM. AFTER ADDITIONAL TROUBLESHOOTING, A FAULT WAS FOUND WITH THE RIGHT MAIN GEAR UPLOCK ASSEMBLY. MAINTENANCE REPLACED THE RIGHT MAIN GEAR UPLOCK ASSEMBLY.