As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 38,000 FEET A THUMP WAS HEARD FOLLOWED BY THE GEAR DISAGREE N CAS AND A HASHED BOX ON NOSE GEAR INDICATOR. APPROXIMATELY 30 MINUTES LATER WE HEARD A SECOND THUMP AND THE CAS MESSAGE CLEARED. REPLACED STEERING SYSTEM. OPS CHECK GOOD. IAW MM 32-50-50.