What was found
AIRCRAFT RETURNED TO HANGER AFTER HAVING THE IN TRANSIT LIGHT ON WHEN THE GEAR WAS SELECTED UP. AIRCRAFT WAS JACKED AND GEAR SWING CARRIED OUT IAW TABLE VII-1 OF PIPER MAINTENANCE MANUAL AND TROUBLE SHOOTING. FIRST GEAR SWING EVERYTHING WORKED AS PER NORMAL, A SECOND GEAR SWING FOUND WHEN THE HYDRAULIC PUMP BYPASSED THE RT GEAR DROPPED DOWN OPENING THE D-DOOR. INVESTIGATION SHOWED THE RT UPLOCK WAS JUST CATCHING THE ROLLER ON THE END OF THE HOOK AND WITH A LITTLE PUSH IT WOULD FALL DOWN WITH NO PUMP PRESSURE. RT UPLOCK ROD ADJUSTED, THREE MORE GEAR SWINGS CARRIED OUT, GEAR FUNCTION CHECKED SERVICEABLE. AIRCRAFT WAS RETURNED TO SERVICE.