. 144 , 201caccounting for the impairment or disposal of long-lived assets , 201d we review property , plant and equipment for impairment whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable . an impairment loss would be recognized when estimated future undiscounted cash flows relating to the asset are less than its carrying amount . an impairment loss is measured as the amount by which the carrying amount of an asset exceeds its fair value