S. 263 : Commissioner-Revision of orders prejudicial to revenue-Limited scrutiny to full scrutiny-No mention in order-sheet that limited scrutiny converted into full scrutiny-Neither Principal Commissioner nor Department producing any document or approval for converting limited scrutiny into full scrutiny in case of assessee-Revision order and consequential proceedings bad in law-No appeal is filed against 263 order-Revision jurisdiction in this case by the Principal Commissioner was wrong and illegal, the consequential order passed under section 143(3) of the Act was also not sustainable in the eyes of law and was accordingly quashed. [S. 143(3)]