As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, RECEIVED A YELLOW HASH NOSE GEAR INDICATION, FOLLOWED BY A GEAR DISAGREE WARNING MESSAGE FOR 1 MINUTE. THEN MESSAGE CLEARED PRIOR TO ANY CREW ACTION. SELECTED GEAR DOWN. NORMAL EXTENSION. RETURNED TO DEPARTURE. R & R THE NLG DOWNLOCK PROXIMITY SENSOR IAW AMM 32-61-05. OPS CHECKED GOOD.