Operations of nearly 400 flights were disrupted – both arrivals and departures – at Delhi’s Indira Gandhi International (IGI) Airport following a technical glitch in the Automatic Message Switching System (AMSS) that handles flight plan messages, forcing controllers to process them manually. The Airports Authority of India (AAI) said in a statement that the issue, detected on November 6, caused delays in processing flight data, but the AMSS systems are “up and functional now”.

AMSS is a key communication network that links air traffic control, airports, and airlines. It automatically processes and transmits flight plans, route clearances, and operational updates. When it malfunctions, staff have to handle data manually, which in turn, slows down operations and causes flight delays.

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