As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4400-IAD CREW REPORTED BLEED VALVE FAIL ON EICAS DURING TAKEOFF ROLL UNSURE OF WHICH SIDE FAILED MESSAGE CLEARED OFF EICAS. IAD MX PERFORMED OPERATIONAL CHECK OF AIR BLEED SYSTEM IAW EMB145 AMM 36-00-00 AND EC3610-01075 AND COULD NOT DUPLICATE. OPERATIONAL CHECKS SATISFACTORY AND ACFT WAS RELEASED TO SERVICE.