New Delhi: Former Air Chief Marshal Sashi P Tyagi, who is facing corruption allegations in the Rs 3,546 crore chopper deal with Italy's AgustaWestland, on Wednesday denied having any involvement in the case and said changes in the helicopter tender were made before his tenure started. He, however, said he is ready for an inquiry into the bribery case that led on Tuesday to the arrest of Giuseppe Orsi, CEO of Finmeccanica, which owns AgustaWestland.