Hi Laura,
There is no option to copy the component line in SAP PM.
One thing i can suggest is, if you have the details in a excel spread sheet, then you can copy and paste the data directly.
Also make sure, you give as below, i tried this, it was working fine and copied. since the description is copied from material master, i didnt give it in excel.
80000131 | 1 | EA | L |
Once copied press enter, components will be updated.
If BOM is maintained for equipments, it will be easy to select the materials in one click.
Regards
Terence