Flight operations were severely affected on Friday after a major technical glitch in the AMSS system at Delhi’s Indira Gandhi International Airport, due to which more than 200 flights were delayed. Earlier it was told that this has affected Mumbai Airport also, however later Mumbai Airport Authority said that advisory was issued to the passengers by mistake.

AMSS failed at Delhi airport

As soon as the AMSS system crashed at Delhi Airport, the air traffic control had to leave the automatic mode and work manually. Due to this, the data of each flight had to be processed manually. Distance calculations of the planes also had to be done manually and coordination had to be done through voice communication, due to which the operation of flights became much slower than usual.

Delay of more than an hour at Delhi airport

At present, there is an average delay of 62 minutes i.e. more than an hour in the departure of flights at Delhi Airport. According to data from Flightradar24, this delay has increased after a technical glitch in the air traffic control system. Airports Authority of India (AAI) has said that its teams are busy fixing the AMSS (Automatic Message Switching System), which supports ATC data. There are approximately 1,500 flight movements daily at Delhi Airport. Under normal conditions, 60-70 flights take off and land per hour. In such a situation, due to automation failure, the backlog of flights increased rapidly and the delay extended for several hours, the effect of which was seen in the entire network.

Mumbai Airport issued clarification

Mumbai Airport (MIAL) said that the advisory issued earlier was issued by mistake and was a human error. The airport clarified that all flight operations here are running completely normal and smoothly.

What is AMSS system?

AMSS is the system that sends flight plans, weather information, and other technical data between ATC and airlines. Once it fails, controllers have to enter all the data manually, which makes operations extremely slow and significantly affects flight time.

AAI issued advisory

Airport Authority of India issued a statement saying that due to AMSS malfunction at Delhi Airport, flight operations are getting delayed and the controllers are processing all the plans manually. Technical teams are continuously working on restoring the system. Passengers have been advised to stay in touch with their airlines and keep checking updated schedules.

Advisory issued for the convenience of passengers

Authorities have requested passengers to keep checking flight information from their respective airlines, be prepared for possible delays and follow instructions given at the airport. The situation is being monitored in both Delhi and Mumbai so that the system can be normalized as soon as possible.

The flight of Indigo Airlines going from Ahmedabad to Diu was chaos on Wednesday (July 23, 2025) when the technical fault came to light just before the takeoff. Flight number 6E 7966 was to leave at 11 am, but as soon as the aircraft was preparing for the takeoff on the runway, the pilot sent a message to the air traffic control (atC) and stopped the immediate takes off.

Aircraft returned from runway
The aircraft, which was going to fly with 60 passengers, was immediately removed from the runway due to security reasons and brought back to Bay. The aircraft was taken to a safe position and examined and all the passengers were removed from the aircraft. After the news of the takeoff stop, there was an atmosphere of nervousness among the passengers for some time, but due to the readiness of the airline and the airport staff, the situation was soon controlled. All passengers have been described as safe.

Airline confirms confirms, investigation continues
It has been confirmed by IndiGo Airlines that the flight was stopped for technical reasons and the decision was taken keeping the safety of passengers paramount. At present, technical investigation of the aircraft is being done, after which the plan for further flight will be decided.

Indigo airline regretted
IndiGo has regretted the inconvenience caused to the passengers and assured that every effort is being made to reduce any further problems. The statement said, “We are offering full refund to the passengers on refreshments, space or ticket cancellation in the next available flight.”

Technical fault also occurred in flight going from Goa to Indore
This incident has come to light at a time when an Indigo flight going from Goa to Indore on Monday had a technical fault just before landing. However, the aircraft had reached Indore safely. IndiGo said that the aircraft will be fully investigated before starting the operation of that aircraft.

Report- Varun Bhasin.