As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF LANDING GEAR NOT UPLOCKED AND AFTER LANDING : LANDING GEAR SYS DISAGREE NOSE LANDING GEAR UNLOCKED RED INDICATION AND ON SD RED TRIANGLE DURING INITIAL CLIMB. IAW TSM 32-31-00-810-865-A THE GREASE CONTAMINATION OF THE UPLOCK N.L.G PROXIMITY SENSORS WAS CLEANED AND AS PER AMM TASK 12-12-32-611-005-A N.L.G SHOCK ABSORBER OIL REPLENISH AND NITROGEN FILLING WAS PERFORMED.