As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE OFF, RECEIVED A STEERING INOPERATIVE CAUTION MESSAGE, THEN A GEAR DISAGREE WARNING MESSAGE. THE MAIN GEAR WERE SHOWING DOWN AND GREEN BUT THE NOSE GEAR WAS SHOWING DOWN BUT WHITE. RAN QRH, RETURNED TO FIELD. REMOVED AND REPLACED THE NLG STRUT SEALS WITH SERVICEABLE UNITS. PERFORMED GEAR SWINGS AND NWS OPERATIONAL CHECK. OPS CHECKED GOOD IAW AMM.