As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PARK BRK NOT RELEASED ON APPROACH. RAN QRH AND MESSAGE EXTINGUISHED. DIVERTED TO LAX FOR PRECAUTION (FLIGHT #3745 FILED CLOSED) REPLACED DUAL EMERGEN. PARK VALVE PER AMM 32-44-01, ADJUSTED AND TESTED PER AMM 33-44-00. CYCLED PARKING BRAKE, CHECKS GOOD, NO LEAKS OR FAULTS NOTED. AREA CLEANED AND PANELS SECURED AS REQUIRED. OPS CHECKS GOOD.