Toggle navigation Director of Engineering and Research and Development Arup Chatterjee receiving the clearance certificate from Chief Executive of CEMILAC V S Prasad HAL receives provisional certificate for indigenous Engine, Flight Display Unit from CEMILAC ANI | Updated: Feb 05, 2021 19:16 IST Director of Engineering and Research and Development Arup Chatterjee received the clearance certificate from Chief Executive of Centre for Military Airworthiness and Certification (CEMILAC) V S Prasad. "This development would not only lead to self-reliance but also enable HAL to develop further similar smart instrument display system and multi-function display for various aircraft platforms," Chairman and Managing Director of HAL R Madhavan said.