Mumbai, Dec. 12 -- Institutional Investor Advisory Services India Ltd (IiAS) has faulted IndiGo's promoter and managing director (M), Rahul Bhatia, for not leading from the front when the airline is facing its most challenging operational episode, even as the influential proxy advisory firm has sought a review of the current board structure, which allows Bhatia to nominate half of the board.

Bhatia, who, along with his friend, Rakesh Gangwal, founded IndiGo in 2006, owns 35.7%, while the airline's senior leadership, including chief executive officer Pieter Elbers, have faced a nationwide backlash for flight cancellations, halting the country's booming aviation sector in the first week of December.

"[A]s the only executive director on th...