Relation between Maintenance Order No. and Operation Number

Hi all,

I have to make a module pool in which i want to display the following field

Order No.

Operation no. | Operation Description |

Now my problem is that i m not getting the tables from which i have to select data basically i want to extract the data on the basis of Maintenance Order No. and Operation Number.

I have checked the following tables

AFKO , AFVu , AFVC, CAUFV.

But i m not able to find any relation between Maintenance Order No. and Operation Number.

Please help!!!

Thanks and regards,

Rachit khanna