Rachin,
Run SHD0. Give IW81 in field Transaction Code. Keep cursor in field Transaction Variant and press F4.
You will get values if some work was done on this Tcode here. Here the value we got is ZIW81
(In case you do not get any values you need not proceed further)
Now take this value and Continue.
A Transaction variant is a group of several screen variants. (Initial screen, and various tabs etc)
You see in this case several screen-variants are seen. Our screen is initial screen i.e., 0106.
Now Go to Screen Variants Tab and give this value. i.e., ZIW81_0106 and click on Display.
This screen will be in front of you. Here for your case, the check-boxes against the fields Equipment and Serial number in the Column Invisible should be tick-marked like shown below.
I did not work much on SHD0, If you are interested, refer to this document.
However, if you do not find anything in SHD0 for this post, continue in other angles.
Jogeswara Rao K