Two Depreciation Rates for One Asset

Hi All,

We have a requirement where the client is having one asset and there are two units to the same asset. We have to maintain two different depreciation rates for each unit.

Example:

Asset : Airplane

Units : 2

Unit 1 : Engine

Unit 2 : Wing

Depreciation should calculate for both the units, each unit different rate,

Unit 1 : Engine --> 5%

Unit 2 : Wing -->    8%

How can i assign two different rates for the Airplane Asset.

Regards,

SM