As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRKG BRK NOT RELEASED EICAS MSG IN CRUISE QRH DID NOT REMEDY THE ISSUE CONTINUED UNTIL LANDING AFTER LANDING EMER BRK FAULT. (EMERGENCY DECLARED). INTERROGATED CMC AND FOUND FAULT CODE 32400015UT1. FOLLOWED FIMTASK 32-41-00-810-863-A TO BLOCK 21. FOUND ISSUE TO BE EMERGENCY/PARKING BRAKE PRESSURE-SWITCH 1. RAR SWITCH IAW AMM 32-44-09-400-801-A. FUNCTIONAL TEST GOOD. NO FURTHER DEFECTS NOTED.