On 30 January 2016, an Airbus A320 crew cleared for an ILS approach to runway 11 at Delhi reported established on the runway 11 LLZ but were actually on the runway 09 LLZ in error and continued on that ILS finally crossing in front of a Boeing 737-800 on the ILS for runway 10. The Investigation found that the A320 crew had not noticed they had the wrong ILS frequency set and that conflict with the 737 occurred because Approach transferred the A320 to TWR whilst a conflict alert was active and without confirming it was complying with its clearance.
Description
On 30 January 2016, an Airbus A320 (VT-EDD) being operated by Air India on a scheduled domestic passenger flight from Shamshabad to Delhi as AIC543 and a Boeing 787-800 (VT-JBE) being operated by Jet Airways on a scheduled domestic passenger flight from Bengaluru to Delhi as JAI833 came into close proximity in day VMC when the A320 passed ahead and below the 737 as both followed the ILS to different runways which had intersecting extended centrelines. ATC instructed the 737 to go around and the A320 crew subsequently initiated a go around themselves. No avoiding action manoeuvre was performed by either aircraft and none of the 276 passengers on board the two aircraft were aware of the encounter. The minimum recorded separation was 1.2nm laterally and 300 feet vertically.
Investigation
Neither the controller nor the Air India pilots directly involved logged or otherwise reported the event but when it became known, an Investigation was commenced for the Indian DGCA by a specifically-appointed Committee of Inquiry established in accordance with the Aircraft Accident Investigation of Accidents and Incidents Rules 2012 and supported by the Aircraft Accidents Investigation Bureau. Recorded ATC communications with both aircraft and recorded ATC radar data were the main source of factual information about the event.
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