Asset Impairment - how to zero out Accumulated depreciation

Hi,

We are implementing Asset Impairment on PeopleSoft 9.2 version. As per US GAAP, requirements for an impairment loss are to do the following:

1. Recognize an impairment loss for the amount of an asset’s carrying amount that exceeds its fair value.
2. When the loss is recognized, the adjusted carrying amount becomes the new cost basis. This includes zeroing out LTD accumulated depreciation.

Example of 100% impairment:

Asset Original Cost      1000

Accumulated Depr             400

Net Book Value (NBV)       600

Fair Value is $0

Dr Impairment Exp            600

Dr Accum Depr 400

Cr Asset 1000

But the entries created as per PeopleSoft Impairment process would be:

Dr Impairment Exp            600

Cr Asset 600