What was found
BOS-CLT - FLT 1659 - AFTER TAKEOFF, THE LANDING GEAR LANDING RELEASE BUTTON WAS STILL DETENTED. THE LANDING GEAR WAS RAISED USING THE ALTERNATE METHOD. THE AIRCRAFT FLEW LONG ENOUGH TO PREVENT LANDING OVERWEIGHT. THE AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE CHECKED THE LANDING GEAR OVERRIDE OPERATION AND INTEGRITY. THE NOSE GEAR STRUT WAS SERVICED AND THE NOSE GEAR AND GROUND SENSE LINKAGE WAS LUBRICATED. THE NOSE GEAR RETRACTION AND EXTENSION SYSTEM WERE OPERATED SEVERAL TIMES, ALL OPERATIONS WERE NORMAL. (M)