The engine models are as follows:
A319/320: IAE V2500 series
737: CFM 56-3 series (what else would they be?!)
747: Pratt&Whitney JT9d-7's on 742 and PW4056 on 744)
767: Pratt&Whitney JT9d-7's on 762 and PW4056 on 762 and 763 ER's
777: PW4084 on A models and PW4090 on the ER
Hope that gives you some help!
If you know what's really going on then you'll know what to do