India's aviation watchdog, the Directorate General of Civil Aviation (DGCA), has imposed a substantial penalty of ₹22.20 crore on IndiGo Airlines following extensive flight disruptions in December 2025. The disruptions, which occurred primarily between December 3 and 5, 2025, led to the cancellation of 2,507 flights and delays in 1,852 flights, impacting over three lakh passengers across the country. A comprehensive inquiry by a four-member committee revealed that the crisis stemmed from several systemic failures within IndiGo's operations. Key findings included an 'over-optimisation' of crew, aircraft, and network resources, leaving minimal operational buffer. The airline was also found to have inadequately implemented revised Flight Duty Time Limitation (FDTL) norms, which are crucial for pilot rest and duty periods, resulting in crew being overstretched. Deficiencies in system software support and shortcomings in management structure and operational control were also cited as contributing factors. Beyond the financial penalty, the DGCA has taken strict enforcement action against IndiGo's senior management. Warnings were issued to CEO Pieter Elbers and Accountable Manager (COO) Isidre Porqueras for inadequate oversight and failure to assess the impact of the winter schedule and revised FDTL norms. Furthermore, Jason Herter, the Senior Vice President of the Operations Control Centre, has been ordered to be removed from his operational responsibilities. The penalty itself comprises a one-time systemic fine of ₹1.80 crore for multiple violations of Civil Aviation Requirements (CARs) and an additional ₹20.40 crore levied for 68 days of continued non-compliance with FDTL rules. IndiGo has also been directed to furnish a ₹50 crore bank guarantee to ensure long-term systemic corrections and compliance with regulatory directives.