As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH FL180 BRAKE ON LIGHT CAME ON & REMAINED ON FOR ENTIRE FLIGHT. LIGHT EXTINGUISHED AFTER TAXIING & STOPPING, THEN STARTING & RELEASING PB. TRANSFERRED TO NRWC 663-ORD-01469. REPLACED PARKING BRAKE PRESS SWITCH IAW MM 32-44-07, OPERATIONS CHECKED & LEAK CHECKED GOOD.