IndiGo flight 6E 6559, scheduled to leave Lal Bahadur Shastri International Airport at Babatpur for Bengaluru at 11:55 am on Monday, 14 September 2026, was held after the pilot reported ear pain and ill health and refused to operate. All 178 passengers had already boarded. Cabin protest followed. A CISF Quick Reaction Team reached the aircraft, calmed the situation, and passengers were deboarded to the terminal. The airline arranged a relief pilot from Delhi, with departure indicated around 5 pm.

A pilot declaring unfit after boarding is an operational stop, not a passenger debate. Once the operating crew will not fly, the aircraft does not push back on schedule. The sequence is boarding complete, medical refusal by the pilot, protest inside the cabin, CISF QRT intervention, full deboard to the terminal, and a Delhi relief pilot called in.

CISF QRT presence on a delayed departure is the airport’s security answer when a cabin turns restless. The team’s job here was de-escalation and orderly exit to the terminal, not a policing drama. Passengers waiting for Bengaluru spent the afternoon in the terminal while the airline sourced alternate crew from Delhi. The roughly 5 pm departure window is what the airline indicated.

LBSI Babatpur has seen a second IndiGo pilot ill-health hold of this kind within the same month. An earlier Thursday episode involving a Mumbai-bound service ran roughly four hours late after a Hyderabad relief pilot was arranged. That prior file is context only. Monday’s 6E 6559 Varanasi–Bengaluru hold stands on its own numbers: 178 passengers, 11:55 am schedule, ear-pain refusal, CISF calm-down, Delhi relief crew, evening push targeted near 5 pm.

Aviation medical fitness is individual. A pilot who reports ear pain is invoking a fitness bar that airlines and regulators treat as non-negotiable. Relief crew from another metro is the standard workaround when the base does not have an immediate spare.

For passengers who cleared security and boarded on time, the afternoon became a terminal wait. For CISF and airport operations, it became a cabin-management and deboard exercise. For IndiGo, it became a same-day crew swap on a busy Bengaluru sector out of Varanasi. None of those layers changes the core fact: the scheduled pilot would not operate after citing ear pain, and the flight did not leave at 11:55 am.

Until the aircraft actually departed with the relief crew, the public picture remained delay, deboard, and a Delhi pilot on the way. Readers tracking 6E 6559 on Monday should hold that sequence, not a rumour about what was said in the cockpit beyond the ear-pain and ill-health refusal already on record.