Overview
- The IP-based Automatic Message Switching System that feeds flight‑plan data failed on November 7, forcing controllers to prepare plans manually.
- More than 800 flights were delayed at IGIA and at least 20 were cancelled, with departure waits averaging roughly 50–60 minutes at the peak.
- The disruption spilled over to routes involving Mumbai, Jaipur, Lucknow and other cities as Delhi-origin schedules slipped.
- AAI engaged the original equipment manufacturer, deployed ECIL specialists and added staff to manually process plans before restoring the system Friday night.
- An enquiry into the cause has been announced, and airport and airlines advise passengers to check flight status as operations return to normal.