As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR MAKES CLUNKING SOUND DURING CRUISE FLIGHT. APPROXIMATELY EVERY 15 MINUTES IT SOUNDS LIKE NOSE GEAR IS BEING RETRACTED. ADJUSTED NOSE GEAR UPLOCK CABLE IAW 750 MM 32-30-06. ADJUSTED NOSE GEAR UPLOCK SWITCH IAW 750 MM 32-30-05, NOSE GEAR OPS CK GOOD.