Indian Airlines Flight 257 was a flight on August 16, 1991 that crashed on its descent into Imphal, killing all 69 occupants (including 1 infant).
The flight was operating on the Calcutta-Imphal sector crashed into Thangjing hills, about 20 nautical miles (40 km) south-west of the Imphal airport. The aircraft had earlier taken off from Calcutta around noon and it began a descent into Imphal airport at around 12:41, with the visibility at that tim...
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Indian Airlines Flight 257 was a flight on August 16, 1991 that crashed on its descent into Imphal, killing all 69 occupants (including 1 infant).
The flight was operating on the Calcutta-Imphal sector crashed into Thangjing hills, about 20 nautical miles (40 km) south-west of the Imphal airport. The aircraft had earlier taken off from Calcutta around noon and it began a descent into Imphal airport at around 12:41, with the visibility at that time being seven kilometers. However, the aircraft lost contact with Imphal airport after 12:45 or 5000 feet on the Instrument Landing System. The search and rescue efforts were hampered by bad weather conditions and a difficult (slushy) terrain.
The probable cause of accident was attributed to an "error on the part of the Pilot-in-Command in not adhering to the operational flight plan and ILS let down chart and not realizing that his early descent to 10,000 feet (3,000 m) and turning right for outbound leg without reporting overhead VOR would...
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