As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BRU FLT 751 EN ROUTE BRU TO PHL. RIGHT DUCT LEAK LIGHT ON, EICAS MSG R BLD DUCT LEAK DISPLAYED. LIGHT OFF AFTER ENGINE BLEED AIR SUPPLY AND ISOLATION VALVED CLOSED. THE FLIGHT DECLARED AN EMERGENCY AND RETURNED TO FIELD BRU. THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED A BURST RIGHT WING L/E BLEED DUCT, AND THE RIGHT I/B PRESSURE RELIEF PANEL.