The Hindustan Aeronautics and Defence Avionics Research Establishment have been carrying out an upgradation of the fighters, which were inducted into the IAF in the late 70s.

• 调查小组根据印度空军提供的资料，调查了印度空军所使用的另外两架美洲虎战机，因为有 报道说罗.；罗 公司提供的发动机推力偏低。