A breakdown in the Automatic Message Switching System (AMSS), a vital component of the Air Traffic Control (ATC) network that relays data to the Auto Track System (ATS) for flight planning, triggered this disruption that began late Thursday.
Later, on Friday, the Airports Authority of India (AAI) indicated that automated operations might experience slight delays due to backlogs, but normalcy would soon be restored.
Update on Technical Fault at IGI Airport, New Delhi
NEW DELHI, November 7, 2025 – AAI at Indira Gandhi International Airport informed about a technical issue in the Automatic Message Switching System (AMSS) that impacted the processing of flight plan messages. The issue was…— Airports Authority of India (@AAI_Official) November 7, 2025
In the most recent advisory on November 8, Delhi Airport reported that flight operations are ‘gradually improving’.
Flight tracking platform Flightradar 24 noted that 129 flights (53 arrivals and 76 departures) were delayed on Saturday, a significant decrease from nearly 800 on Friday.
This morning, Delhi Airport released a statement saying, “The technical issue affecting the Automatic Message Switching System (AMSS), which supports the Air Traffic Control flight planning process, is gradually improving. Airline operations at Delhi Airport are returning to normal, and all relevant authorities are diligently working to minimize any inconvenience. Passengers are encouraged to keep in touch with their airlines for the latest flight updates.”
Passenger Advisory issued at 06:36 Hours#DelhiAirport #PassengerAdvisory #DELAdvisory pic.twitter.com/7AB6ewJoA7
— Delhi Airport (@DelhiAirport) November 8, 2025
In the meantime, IndiGo Airlines also provided an advisory, stating that flight operations are being ‘progressively’ restored at the airport.
“We are pleased to announce that the temporary AMSS system outage affecting Air Traffic Control has now been resolved, and normal operations are progressively being restored at Delhi Airport and other affected airports in the northern region,” it noted.
We are pleased to report that the temporary AMSS system outage affecting Air Traffic Control has now been resolved, and normal operations are progressively being restored at Delhi Airport and other impacted airports in the northern region.We appreciate the…
— IndiGo (@IndiGo6E) November 7, 2025
Earlier on Thursday, Delhi Airport experienced over 500 flight delays, which escalated to more than 800 flights by Friday. The Airports Authority of India (AAI) remarked that while technical failures are rare, flight safety was “never compromised.”
“There was no impact on aircraft already airborne. The disruption was strictly related to the pre-departure message flow and flight plan processing,” an official was quoted as saying by NDTV.
The technical issue also affected several airports, including Hyderabad, where multiple aircraft were delayed due to poor ATC performance, NDTV reported.
(Edited by : Sudarsanan Mani)
First Published: Nov 8, 2025 10:46 AM IST
