As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DCA INFLIGHT - AFTER TAKE OFF HEARD LOUD BANG AND LIGHT LEFT YAW. ENGINE PRESSURE RATIO DROPPED TO .27 THEN RECOVERED. ALL ENGINE INDICATIONS NORMAL. LANDED DCA WITHOUT INCIDENT. REPLACED NR 1 ENGINE ON 20 OCTOBER AT DCA DUE TO STALLS. SYSTEM GROUND CHECKED NORMAL OPERATION.