As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW CREW REPORTED LT BLEED AIR INOPERATIVE WITH RT BLEED AIR ON PLACARD & UNABLE TO PRESSURIZE ACFT. FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. RESET LT BLEED AIR DB THAT HAD POPPED. SYS GND CHECKED NORMAL, OPERATION CLOSED.