The PNF confirms a positive rate of climb on his VSI and raises the undercarriage lever (also a lock and toggle switch). These calls have been omitted in the preliminary report. Why was the landing gear in the down position all the way till the crash?

Over a month after the tragic Air India flight AI 171 crash, aviation experts are challenging the official probe's preliminary report.

The AAIB report gave significant insights into what happened in the minutes and seconds leading up to the crash that took 260 lives.