India, Nov. 7 -- The Airports Authority of India (AAI) announced on Friday that its air traffic control messaging system at Delhi Airport is "up and working" after a technical glitch disrupted the schedules of more than 800 flights.

According to the airport, a technical issue was detected with the Automatic Message Switching System (AMSS) that supports the ATC flight planning process.

Air traffic controllers were forced to manually prepare flight plans using available data, a time-consuming process that resulted in flight delays.

Services of all major domestic airlines, including IndiGo, Air India, and SpiceJet, were affected, resulting in long queues and slower operations at the airport. Delays were also reported in airports in Mumbai...