As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON TAKEOFF OUT OF KTVC AND SUBSEQUENT GEAR UP CALL THE GEAR RETRACTS BUT THE UNLOCK LIGHT DOESN'T EXTINGUISH. ALL 3 GREEN LIGHTS GO OUT. HYDRAULIC PRESSURE LIGHT STAYS ILLUMINATED AND THEN FLASHES AFTER APPROXIMATELY 40 SECONDS. REMOVED DEFECTIVE NLG UPLOCK SWITCH ASSEMBLY (P/N: 65–430087, S/N: 0247) AND INSTALLED NEW SWITCH ASSEMBLY (P/N: 65-430087, S/N: 2402).