India's aviation watchdog DGCA has issued fresh show-cause notices to IndiGo's Chief Operating Officer and accounting manager after massive nationwide flight disruptions. This comes a day after the CEO was also served a notice. The regulator says IndiGo failed to implement the new crew roster rules, triggering widespread delays and cancellations. The DGCA has cited serious lapses in planning, oversight, and resource management, giving the airline 24 hours to explain or face action.