Depreciation posted asset return to the vendor

Dear Team,

We are capitalized one asset 2015-2016.Depreciation posted for these asset till date.

Now the requirement is we want decapitalise the same asset and send it back to the vendor.

Ex.    Asset acquis value      100000.

         Depreciation value        30000

         Net Book value            70000.

Now we Need to pay 100000 for these vendor.

1) Which are the T Codes to be used for this transaction ?

2) Since the asset was capitalized last year, what would be the treatment on Depreciation already charged ?

Thanks,

Rajendhar G