As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOI - FLIGHT CREW REPORTED UNSAFE GEAR INDICAION DURING EXTENTION CYCLE UPON APPROACH. CYCLED GEAR, NO CHANGE IN INDICATION. CREW USED ALTERNATE GEAR EXTENTION METHOD. GEAR EXTENDED AND INDICATED DOWN AND LOCKED WITHOUT INCIDENT. MAINTENANCE FOUND THE NOSE GEAR SELECTOR VALVE SHAFT LEAKING. REMOVED AND REPLACED NOSE GEAR SELECTOR VALVE. OPERATIONAL GEAR SWINGS CHECK GOOD. LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.