What caused the chaos at IndiGo

India’s largest airline IndiGo has been forced to delay and cancel hundreds of flights as it struggles to cope with new pilot rest and duty-hour norms, even a month after their implementation. On Tuesday, barely three out of ten flights of the carrier, where punctuality is central to its branding, departed on time, upsetting passengers and exposing the airline’s unpreparedness to deal with the new rules during peak travel season. The airline cancelled around 130 flights on Tuesday and is likely to cancel more than 150 flights today.