As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - INFLIGHT AT LIFT OFF OF NOSE WHEEL AIRCRAFT JERKED TO THE LEFT. FLIGHT ATTENDANTS IN BACK HEARD A BANG. NO INDICATION OF AN ENGINE SURGE OR STALL. LANDED ORD WITHOUT INCIDENT. FLIGHT DATA RECORDER INDICATED A COMPRESSOR STALL AT TAKEOFF FOR THE LEFT HAND ENGINE. REPLACED LEFT HAND ENGINE ON 22 JUNE 2006 AT ORD.