Usage of BAPI_EQUI_CHANGE

Hi,

i use BAPI: 'BAPI_EQUI_CHANGE' to change some fields of an equipment.

Now i have to change the garantie fields of the eqipment.

This fields are store in BGMKOBJ-GWLDT and BGMKOBJ-GWLEN.

I cannot find this field in the Parameter of the BAPI.

Is there another Bapi/FM to change this Fields?

Thanks.

regards, Dieter