As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 1873 - EN ROUTE DFW-SEA, AFTER TAKEOFF LEFT ENGINE EXHAUST TEMPERATURE WENT TO 903 FRO TWO SECONDS. AIRCRAFT RETURNED TO DFW AND LANDED WITHOUT INCIDENT. TROUBLESHOT AND REPLACED BLEED VALVE CONTROL UNIT. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)