3551 PARKING BRAKE RELEASE FAULT. FC 717 ~~~~~ 3551 PARKING BRAKE RELEASE FAULT. FC 717  3551 Found FC 717 (Parking Brake Release Fault). Found Brake Frame Parking Brake Release Pressure Switch air leak, causing intermittent FC 717. Replaced new pressure switch. Brake cyclic test - OK.  Aliff/Daniel 45260