18. Further, it has been demonstrated by the learned AR of the assessee that in many cases the department is considering such aircraft as „aeroplane‟and granting depreciation to the respective assesses @ 40% and such contention of the assessee is based on the information given by the department itself. The department has not been able to bring on record any of the cases wherein such aircraft has been considered by them eligible for depreciation under the head „Machinery and Plant.‟ Not going into the controversy whether or not the issue regarding the claim of depreciation was deliberated during the course of original assessment proceedings, we are of the opinion that the Assessing Officer had granted the depreciation to the assessee @ 40-% in accordance with the provisions of the Rule, therefore, such grant of depreciation cannot be considered to be a claim not supported by law, as the department cannot straightaway show that such claim of depreciation was not in accordance with the law and, in such, circumstances, the powers u/s 263 could not be invoked.”