As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - DURING TAKEOFF RIGHT ENGINE BLEED OFF LIGHT ILLUMINATED TWICE WITH SUBSEQUENT EICAS MESSAGE. ABORTED TAKEOFF AND AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED NUMBER TWO ENGINE REVERSE FLOW SENSOR AND PRESSURE REGULATING SHUT OFF VALVE. SYSTEM GROUND CHECKED NORMAL OPERATION.