Asset impairments: How to set-up secondary depreciation accumulated account SDA?

Asset impairments: How to set-up secondary depreciation accumulated account SDA? How to get F1202|CHCD = 3?

We are in the process of impairing our assets on a mass scale (ie thousands of them) and we have explored the idea of negative assets & splitting assets but this is not the best option in our eyes. We would want to debit the impairment loss account and credit the secondary accumulated depreciation account and then let JDE calculate the depreciation based on the impaired net book value on the remaining life.

The ideal solution would be to use AAI SDA Secondary Depreciation Accumulated, so the variables 23 and 24 are being picked up in depreciation formulas. Unfortunately, with our current set-up, when we post a journal to the secondary depreciation account (which has been defined on the SDA AAI) it is not being posted to the FA Balances table (F1202) with a Balance Character of “3” (Secondary A/D). Consequently, it then doesn’t get recognised by formula elements 23 (A/D Bal Fwd Secondary) or 24 (YTD A/D Secondary).