Vistara pilots sought sick leave en masse, leading to severe operational issues at the Tata Group-owned airline. The move led to 35–50 flights being disrupted as pilots were not available. This was prompted by a revised salary system the airline was trying to implement ahead of its merger with Air India, according to two people with knowledge of the matter.Pilots were sent an email on March 15 asking them to sign up for a new pay str...