As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD INFLIGHT T289 - LEFT ENGINE COMPRESSOR STALL JUST AFTER LIFT OFF. RETURNED TO ORD AND LANDED WITHOUT INCIDENT. REPLACED NUMBER ONE ENGINE ON 17 FEB AT ORD DUE TO FAILURE OF NUMBER SIX HIGH PRESSURE COMPRESSOR BLADE. SYSTEM GROUND CHECKED NORMAL OPERATION.