FA Tax Book linked to Secondary Ledger - Not calculating amount correctly

HiWe have a tax book linked to secondary ledger in different currecy, same COA.
According to documentation the values posted to GL should be converted based on the Exchange Rate entered for the Date placed in Service.
The GL Drilldown is not allowed for this setup.
We are getting non expected values for the depreciation in the secondary ledger.
Is there a way to know how is the system getting the exchange rate to be used? Like a query?

Thanks,
Eduardo