IndiGo has been fined Rs 5 lakh by the Bureau of Civil Aviation Security (BCAS) for violating aviation security protocols, although specific details of the violation remain unclear. The airline is currently reviewing the order issued on November 27 and intends to appeal to the relevant authority. The fine is related to a breach under Rule 51 of the Aircraft (Security) Rules, 2023, but is not expected to significantly impact the company's financials or operations.