What was found
UPON APPROACH TO LNK, WITH GEAR HANDLE SELECTED DOWN MAIN GEARS EXTENDED, NO GREEN NOSE GEAR INDICATION. COMPLIED WITH CE-750 CHECKLIST AFTER TOWER FLY BY-VISUALLY CONFIRMED DOWN, USED BLOW DOWN SYSTEM AS PER CHECKLIST, LANDING UNEVENTFUL. TROUBLESHOT AND FOUND RETRACT PRESSURE RELEASE VALVE STUCK. RESEAT VALVE AND ACTUATED 50 TIMES L AND R NO FUTHER STICKING OR BINDING. PERFORMED 15 NORMAL GEAR CYCLES AND 5 EMERGENCY EXTENSIONS ARE GOOD RESULTS. SERVICED RESERVIOR TO FULL AND GEAR BOTTLE TO 2000 PSI REF 650 MM CHAPTER 12-11, PERFORMED 3 MORE NORMAL GEAR CYCLES BLED SYSTEM ALL CHECKS GOOD.