Two Indigo flights carrying at least 100 fliers each veered 25 seconds away from crashing into each other mid-air owing to turbulent weather in the Guwahati airspace on Tuesday.
The flights involved were a Mumbai-Guwahati flight (6E-813) and a Chennai-bound one (6E-136) from Guwahati.
The airline spokesperson said that four passengers complained of giddiness and two cabin crew were provided first aid as the sudden evasive action to avoid a collision suddenly shook up the plane travelling at cruising speed.
“IndiGo flight 6E-813 en-route to Guwahati from Mumbai experienced turbulence due to monsoon. During such weather situations, there are two kinds of activities – first is “Cumulo-Nimbus” activity and the second is “Clear Air Turbulence” (CAT). While the former can be detected by the weather radar, as per which the flight crew typically takes deviations and fly to avoid any turbulence – the latter is experienced occasionally and cannot be detected by the weather radar,” said the spokesperson.
6E-813 flight experienced “Clear Air Turbulence” (CAT) which could not be detected by the weather radar. This caused the Mumbai-Guwahati flight to climb by about 250-300 feet. The Chennai-bound flight was crossing at the same time, added the spokesperson.
Following the prescribed protocol, the pilot immediately applied the Resolution Advisory (RA) alert triggered by TCAS (Traffic Collision Avoidance System). TCAS is an on-board equipment that advises pilots on the traffic in the proximity of the aircraft. RA is the higher critical level among the two alerts issued by TCAS.
“Due to this monsoon activity, passengers along with the cabin crew on board were physically shaken. Four passengers complained of giddiness and two from the cabin crew needed first aid,” the spokesperson added. The flight landed normally and immediately, the four passengers and two cabin crew members were administered necessary medical assistance. As per the doctor’s report, there were no major injuries reported, the spokesperson added.