As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM DUE TO AFTER ENGINES START, THE PARKING BRAKE LIGHT TURNED ON. MAINTENANCE PERSONNEL PERFORMED FIM 32-42 TASK 811 PROCEDURE, DETECTING THE PARKING BRAKE VALVE WITH FAILURE; SO THE PARKING BRAKE WAS DEFERRED IAW MEL 32-3 CAT. C. MAINTENANCE PERSONNEL REPLACED THE PARKING BRAKE SHUTOFF VALVE IAW AMM 32-44-21, TESTED CORRECT AND THE REPORT WAS CLOSED.