As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6402 - BOS-IAD - AIRCRAFT RETURNED TO GATE DUE TO PARKING BRAKE CABLE BROKE DURING APPLICATION. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED PARKING BRAKE CABLE, OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)