Generate text that is semantically similar to this text: n.r. mohanty stated that an agreement had been signed between the defense research and development organisation , hindustan aeronautics limited and the indian air force to upgrade india 's ageing fleet of mig-27 m aircraft .
mohanty stated that the upgrade will be done soon as it has almost been finalised by the defense research and development organisation , hindustan aeronautics limited and the indian air force .