More than 300 passengers on board two planes of the private operator Indigo had a close shave over Bengaluru airspace on July 10, triggering anti-collision alarms.
The Director-General of Civil Aviation (DGCA) has ordered an inquiry.
In a statement on Thursday, Indigo said its TCAS (traffic collision avoidance system) resolution advisory system was triggered when aircraft operating on the Coimbatore-Hyderabad and Bengaluru-Kochi routes came close to each other. The planes came within 4 nautical miles (7.4 km) of each other, with a vertical separation of just 200 feet, they said.
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