As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LH INBD BRAKE MASTER WARNING AT 10500FT. GEAR RETRACTED. (5MIN) ONCE ON GROUND INDICATED 01 BUT BOX WAS RED. REPLACED LH IB BRAKE TEMPERATURE SENSOR IAW CRJ900 AMM 32-46-01-000/400-801-A01-PSA AND REPLACED ANTI-SKID CONTROL UNIT IAW CRJ900 AMM 32-44-06-000/400-801. ALL OPS CHECKS SATISFACTORY.