As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT THROUGH 17,000 AND 330 KTS IAS, GEAR UNLOCK LIGHT ILLUMINATED FOLLOWED BY THE GREEN NOSE GEAR LIGHT THEN BOTH EXTINGUISHED. THUD WAS FELT AND HEARD BY CREW. TROUBLESHOT DISCREPANCY TO A INTERMITTENLY FAILING LANDING GEAR CONTROL VALVE. REMOVED VALVE AND REPLACED IT WITH A MODIFIED VALVE OPS CHECK GOOD. WORK PERFORMED IAW CHAPTER 32-30-02 AND CHAPTER 32-00-01 OF THE CITATION 750 MM.