As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 4783 - LEFT AUTOMATIC POWER RESERVE LIGHT DID NOT ILLUMINATE AND THE LEFT HIGH PRESSURE BLEED VALVE WAS INOPERABLE. THE AIRCRAFTS TAKEOFF WAS ABORTED. AFTER THE SYSTEMS WERE MEL'D THE AIRCRAFT CONTINUED SCHEDULED SERVICE. LATER IN ALB, MAINTENANCE PERFORMED AN OPERATIONAL CHECK AND RAN THE AIRCRAFT. THE SYSTEM OPERATED NORMALLY AND TEH AIRCRAFT WAS RETURNED TO SERVICE. (M)