AN ACR LGT CREW SUFFERED AN ENG SEIZURE.

Narrative

THE CAPT AND I HEARD A LOUD BANG AND FELT A LARGE; INCREASING AIRFRAME VIBRATION AND RESULTANT LOSS OF PWR ON L SIDE. WE ACCOMPLISHED THE EMER ENG FAILURE SEIZURE CHKLIST AND DECLARED AN EMER WITH ATC AND ASKED FOR RADAR VECTORS TO RETURN TO ORD. WE NOTIFIED THE FIRST FLT ATTENDANT. WE FINISHED ALL CHKLISTS AND LANDED NORMALLY WITH SINGLE ENG. I THINK THE ENG FAILURE SEIZURE WAS CAUSED BY A POSSIBLE BEARING FAILURE OR SOMETHING WHICH CAUSED A MASSIVE COMPRESSOR STALL. I DON'T THINK IT COULD HAVE BEEN PREVENTED. ACR'S TRAINING PROCS WORKED WELL IN HANDLING THE SITUATION. BOTH THE CAPT AND I KNEW THE ENG HAD SEIZED; BUT I FEEL WE SHOULD HAVE TAKEN A LITTLE MORE TIME IN ANALYZING THE ENG INSTS BEFORE CUTTING THE FUEL AND PULLING THE FIRE HANDLE. I WAS A LITTLE SURPRISED AT HOW BUSY THE PNF REALLY IS IN A SITUATION OF THIS KIND. A 2 MAN CREW OP IS OK DURING NORMAL OPS; BUT DURING ANY EMER OR ABNORMAL OPS; BOTH CREW MEMBERS NEED TO BE AWARE OF HAZARDS OF GOING TOO FAST AND NOT TAKING TIME TO DOUBLE CHK EACH OTHER AND COMMUNICATE TOTALLY WITH EACH OTHER.