What was found
PILOT REPORTED THAT WHILE EXTENDING THE GEAR, MAINS SHOWED DOWN AND LOCKED, NOSE DID NOT SHOW GREEN INDICATION, GEAR HANDLE IN TRANSIT, REMAINED ILLUMINATED, RAN CHECKLIST, MANUALLY PUMPED GEAR DOWN, HAD 3 GREEN INTRANSIT LIGHT EXT, LANDED WITH NO FURTHER INCIDENT. MX TIGHTENED THE MANUAL RELIEF VALVE B-NUT, OPS CK GOOD.