The crash of Air India Flight 101, which claimed 158 lives on approach to Heathrow, has left investigators grappling with six critical unknowns. The incident, which occurred in clear visibility and calm winds, has defied preliminary explanations, prompting a focus on the aircraft’s systems and crew actions. British aviation authorities, whose standards are regarded as a global benchmark, are leading the inquiry.
First, why did the Boeing 777-300ER deviate from its assigned altitude during the final approach? Radar data shows the aircraft descended below the glide path 400 feet above the ground, a deviation that should have triggered automated warnings. Investigators are examining whether the flight crew received and acted upon these alerts.
Second, what was the status of the aircraft’s ground proximity warning system? The system, designed to sound an alarm when the aircraft is dangerously low, is mandatory under UK regulations. If it failed, that would represent a serious breach of maintenance protocols. If it activated but was ignored, crew training becomes a central issue.
Third, were the cockpit doors secure? Under post-9/11 rules, cockpit doors are reinforced to prevent unauthorised entry. But witnesses reported unusual sounds from the cockpit in the moments before impact. Any breach would require an explanation of how and why it occurred.
Fourth, what communications passed between the cockpit and air traffic control in the final minutes? Transcripts have not been released, but sources indicate that the pilots did not declare an emergency. This silence is perplexing given the aircraft’s dramatic loss of altitude.
Fifth, did fatigue or mental state play a role? The pilot had been on duty for 12 hours, within legal limits but at the upper end of recommended hours. British standards mandate strict rest periods, and any violation could have institutional implications.
Sixth, why did the aircraft’s black box stop recording four seconds before impact? The device, manufactured to UK specifications, should have captured data until the moment of crash. Its premature failure is a mystery that points either to a manufacturing defect or an unforeseen power interruption.
British aviation is built on a culture of transparency and rigorous oversight. The Air Accidents Investigation Branch, one of the world’s most respected bodies, will leave no stone unturned. Its findings will shape safety protocols globally. But these six questions must be answered before families can find closure, and before the industry can claim to have learned from this tragedy.
