As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: ON CLIMB OUT THROUGH APPROXIMATELY 11000 FEET WITH CLIMB POWER ON BOTH ENGINES THE AIRCRAFT SHOOK MOMENTARILY WITH A BRIEF YAW TO THE LEFT. SOON AFTER FLIGHT ATTENDANTS CALLED AND SAID A BRIEF FLAME WAS VISIBLE ON LEFT SIDE. ENGINE NUMBER 1 HAD A COMPRESSOR STALL. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT ORD. REMOVED AND REPLACED NUMBER 1 ENGINE ASSEMBLY. PER JC 08L40072003.