What was found
THE LANDING GEAR HANDLE WOULD NOT MOVE TO UP POSITION AFTER TAKEOFF. THE APPROPRIATE CHECKLIST WAS COMPLETED WITH NO HELP. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE TRIM CYLINDER INTERLOCK FUSE IN THE RT WHEEL WELL AT FAULT. THE TRIM CYLINDER INTERLOCK FUSE WAS BLED IAW MM 32-31-06, PAGE 203 TO 204. THE GEAR HANDLE WAS CYCLED SEVERAL TIMES AND OPERATION CHECKED GOOD.