As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD - FLT 1395 - EN ROUTE PHL-ORD, LEFT ENGINE THROTTLE RETARDED AT 10,000 FEET AND THEN REGAINED POWER UNCOMMANDED. DIVERTED AIRCRAFT TO IAD LANDING WITHOUT INCIDENT. AIRCRAFT NOT OVERWEIGHT. REPLACED LEFT ENGINE FUEL CONTROL AND FUEL PUMP. TRIMMED ENGINE. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)