As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN GEAR WAS SELECTED DOWN ALL GEAR SHOWED UNSAFE INDICATION (THREE RED). MAIN GEAR EXTENDED USING ALTERNATE EXTENSION. NOSE GEAR WOULD NOT EXTEND ON FIRST PULL OF ALT EXTENSION CABLE. FORCEFUL SECOND PULL DID EXTEND THE NOSE GEAR. REMOVED AND REPLACED THE LANDING GEAR SELECTOR VALVE, SERVICED AND BLED SYSTEM PERFORMED GEAR SWINGS GEAR EXTENDED NORMALLY USING ALTERNATE EXTENSION.