Glitch in Delhi airport's ATC message switching system delays and cancels flights; AAI restores it
A technical fault in the Automatic Message Switching System (AMSS) used by Air Traffic Control at Delhi's Indira Gandhi International Airport, which began on 6 November 2025 and continued into 7 November, disrupted flight plan processing and led to delays and cancellations of 46 flights.
Summary
During the Delhi ATC glitch, controllers processed flight plans manually while teams from the Airports Authority of India (AAI) and Electronics Corporation of India Limited (ECIL) worked on the IP-based AMSS. Civil Aviation Minister Rammohan Naidu visited the Delhi Air Navigation Services centre at 10 pm on 7 November and directed more technical staff and ATC personnel to be deployed. AAI said the AMSS had been restored by the night of 7 November, and the system was fully back in automatic mode by the afternoon of 8 November.
Key facts
- System
- Automatic Message Switching System (AMSS), IP-based
- Airport
- IGI Airport, New Delhi
- Duration
- From afternoon of 6 Nov into 7 Nov 2025
- Flights hit
- 46 delayed or cancelled
- Teams
- AAI, ANS, ECIL
- Fully automatic again
- Afternoon of 8 Nov
Practice MCQs 2 questions
Which ATC system at Delhi's IGI Airport developed a technical issue on 6–7 November 2025, affecting the processing of flight plan messages?
Show answer
Correct answer: B — Automatic Message Switching System
AAI said the issue was in the IP-based Automatic Message Switching System (AMSS), which processes flight plan messages.
How many flights were delayed or cancelled due to the ATC messaging glitch at Delhi Airport on 6–7 November 2025?
Show answer
Correct answer: D — 46
The Civil Aviation Ministry said the glitch led to delays and cancellations of 46 flights.