New Delhi, April 1 -- The government on Tuesday appointed Vir Vikram Yadav as director general of the Directorate General of Civil Aviation (DGCA), moved Abhishek Singh out of the India AI Mission to head the National Testing Agency (NTA), and named Chanchal Kumar secretary in the ministry of information and broadcasting (I&B), among a series of senior bureaucratic changes approved by the appointments committee of the cabinet (ACC). Yadav, a 1996-batch IAS officer of the Odisha cadre, takes over India's aviation safety regulator from Faiz Ahmed Kidwai - a 1996-batch officer of the Madhya Pradesh cadre who has been appointed additional secretary in the department of personnel and training. Yadav was serving as additional secretary in the Union ministry of environment, forest and climate change. The DGCA has faced heightened scrutiny in recent months over operational disruptions and safety concerns, most recently IndiGo's disruptions in December 2025 and scrutiny of charter plane operators and small airport. ACC issued two orders - one for additional secretary level positions and the other for secretary level positions. As part of the latter order, Singh, a 1995-batch IAS officer of the Nagaland cadre, has been appointed director general of the NTA under the ministry of education - a secretary-level post - and assumes charge on Wednesday after a handover. He had led the India AI Mission since its launch in March 2024, while also holding additional charge as director general of the National Informatics Centre (NIC) and additional secretary in MeitY, overseeing AI, emerging technologies and the Digital India Bhashini division. Singh called his MeitY tenure among the most fulfilling roles he has held. "I am confident they will carry forward the momentum we have built," he told HT. His team led the AI Impact Summit, which drew participation from over 20 heads of state and representatives from more than 100 countries, with investment commitments exceeding $250 billion....