Serious incident to the Airbus A320 registered VT-WGE and operated by Go Airlines and to the Airbus A320 registered VT-IGK and operated by Indigo on 23/04/2018 en route [Investigation led by AIB / India]
Perte de séparation entre deux avions en croisiére, avis de résolution TCAS
Responsible entity
Preliminary data based on the notification from the Indian authorities:
GOW 585 from Mumbai to Patna FL370 was given descend to FL330 by RSR -South Controller through the level of IGO6488 from Kolkata to Delhli maintaining FL360 without coordinating with RSR -North Controller (having jurisdiction over both GOW585 and IGO6488). Both the aircrafts received TCAS RA. IGO6488 was observed to be following RA but GOW585 was observed to be descending contrary to RA and the PIC was observed to be confirming the controller that She is climbing. the minimum lateral and vertical distance were reduced to 5 NM and 400 feet respectively.