What was found
DURING APPROACH UPON GEAR EXTENSION, NOSE LANDING GEAR DOOR INDICATION REMAINED ILLUMINATED. RECYCLED GEAR, INDICATION CEASED UPON RETRACTION AND REMAINED ILLUMINATED FOR APPROXIMATELY 20 SECONDS AFTER EXTENSION. ALL GEAR LIGHT INDICATED DOWN AND LOCKED. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE ADJUSTED THE DOOR CLOSED TENSION AND LUBRICATED THE ACTIVATION LINKAGE. OPERATIONAL CHECK WAS NORMAL.