As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRBRAKE DEPLOYED/CONFIG WARNING. RETURNED TO GATE. AIRBRAKE RE-DEFERRED USING ORIGNAL DAY OF DISCOVERY. ON DESCENT INTO DTW AIRBRAKE DID NOT WORK. MAINTENANCE REPLACED PCB FROM LOG PAGE 1278197, REPLACED AIRBRAKE MON PCB IAW AMM 31-09-11, PERFORMED OPS CHECK IAW AMM 27-63-11, ALL CHECKS GOOD P/N HC921H0450-004. REMOVED FROM DMR, MXC NOTIFIED.