Flight operations at the national capital’s Indira Gandhi International Airport (IGIA) were severely disrupted on Friday after a key air navigation system suffered a technical glitch, industry sources told businessline .

The malfunction, which occurred late Thursday night, affected the Automatic Message Switching System (AMSS) — which is a key component used for processing air traffic data along with flight planning.

Accordingly, the outage forced ATC (at the Air Traffic Control) controllers to handle flight planning manually.

Industry estimated that over 400 flights were delayed at Delhi Airport as a result of the glitch, with both domestic and international schedules impacted.

The disruption led to airside congestion, along with extended turnaround times, and long waiting periods f

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