**Incident Overview** An Air India Airbus A321 operating a domestic flight from New Delhi to Amritsar briefly entered or came within one nautical mile of Pakistani airspace after a technical failure in its navigation system. The aircraft, which had departed from Indira Gandhi International Airport, deviated westward from its planned route shortly after takeoff. The incident occurred in a highly sensitive region where mutual overflight bans between India and Pakistan have been in place since 2024, making any incursion—even unintentional—a serious operational and political concern. **Role of Air Traffic Control** Pakistani air traffic controllers were the first to detect the deviation and alerted Indian authorities. The aircraft's trajectory was corrected with coordination from Lahore ATC, and the flight returned safely to Indian airspace. This event underscores the critical importance of cross-border ATC communication and the need for robust procedures to handle navigation failures in politically tense airspace. For ATC students, it demonstrates how controllers must remain vigilant and proactive, even when monitoring aircraft not under their direct jurisdiction. **Technical and Operational Consequences** After correcting its course, the A321 proceeded toward Amritsar but faced congestion in the terminal area. Due to airspace saturation and operational constraints, the aircraft was instructed to return to Delhi for a technical inspection of its navigation systems, including the Flight Management System (FMS), Inertial Reference System (IRS), and GNSS receivers. Such inspections are standard after any navigation anomaly. The flight eventually departed again for Amritsar, arriving nearly four hours late. This sequence highlights the ripple effects of a single technical failure on flight schedules and crew duty times—a key consideration for ATPL students managing operational disruptions. **Broader Context: Airspace Restrictions** Since spring 2024, India and Pakistan have maintained reciprocal bans on overflights by each other's airlines, a measure extended until at least summer 2026 via NOTAMs. Indian carriers must now route around Pakistan via Iran or the Gulf, increasing flight times and fuel consumption. Any inadvertent incursion, like this one, carries heightened political sensitivity. For ATPL students, this case illustrates how geopolitical factors directly affect flight planning, navigation, and risk management. It also reinforces the importance of understanding NOTAMs and airspace restrictions when filing flight plans. **Lessons for ATPL and ATC Students** This incident offers concrete learning points: the need for rigorous pre-flight checks of navigation equipment, the importance of cross-border ATC coordination, and the operational impact of airspace closures. For ATC trainees, it emphasizes the value of situational awareness and timely communication. For pilot trainees, it demonstrates how a single system failure can cascade into a major deviation, requiring quick decision-making and adherence to standard operating procedures.