Updating stock information in equipment master

hi all,

I am trying to find a BAPI which changes stock information of Equipment. ( we can change the stock information from ie02 in the serdata tab ) i tried BAPI BAPI_EQUI_CHANGE but there are no importing parameters for Sales Order Number and Line number.

Please let me know if there is any other way if we could update the Sales order number and line number.

Thanks,

Rahul