As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THE NOSE GEAR DOWN INDICATOR LIGHT WOULD 'FLICKER' AND THE GEAR PUMP RUN INTERMITTENTLY DURING TAXI. INVESTIGATION REVEALED THE NOSE GEAR DOWNLOCK HOOK WAS SEVERELY WORN WHERE THE ARM OF THE DOWNLOCK SWITCH CONTACTED IT. THIS ALLOWED THE SWITCH TO CLOSE AS THE DRAG LINK/DOWNLOCK ASSY FLEXED UNDER TAXI LOADS.