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ASN Wikibase Occurrence # 216492
Last updated: 7 May 2020
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Time:06:15 UTC
Type:Silhouette image of generic A320 model; specific model in this crash may look slightly different
Airbus A320-214
Owner/operator:Air India
Registration: VT-EDD
C/n / msn: 4212
Fatalities:Fatalities: 0 / Occupants: 141
Other fatalities:0
Aircraft damage: None
Category:Serious incident
Location:near Delhi-Indira Gandhi International Airport (DEL/VIDP) -   India
Phase: Approach
Nature:Domestic Scheduled Passenger
Departure airport:Hyderabad-Rajiv Gandhi International Airport (HYD/VOHS)
Destination airport:Delhi-Indira Gandhi International Airport (DEL/VIDP)
Investigating agency: AAIB India
Air India flight AI543, an Airbus A320 (VT-EDD), was cleared by Delhi Area Control Centre for arrival and was cleared for an approach to runway 11 at Delhi-Indira Gandhi International Airport.
At the same time Jet Airways flight 9W833, a Boeing 737-800 (VT-JBE), was cleared for an approach to runway 10 at the same airport.
AI543 was vectored for runway 11 and handed over to the Approach Arrival Controller. The flight reported established on the localizer of runway 11. In the meantime 9W833 was vectored for runway 10 and the aircraft confirmed interception of the localizer at 06:11 UTC.
The Arrival Approach Controller released AI543 to Aerodrome Controller South at 8NM from touchdown when the aircraft was slightly south of the localizer of runway 11 at 06:12. Subsequently, 9W833 was released to Aerodrome Controller Middle at 9NM from touch down at time 06:12. At that time, AI543 had crossed the localizer of runway 11 from south to north and was heading towards the localizer of runway 10 on the last assigned heading. Subsequently, AI543 came in conflict with the Jet Airways aircraft and the Current Conflict Warning (CCW) was generated twice by the system in the control tower. The lateral separation was reduced to 1.2 NM approximately and vertical separation was reduced to 300 feet between both the aircraft.
Although, landing clearance was not issued to AI543 by the Aerodrome Controller South, the aircraft continued the approach to runway 09 and later on executed a missed approach. ATC instructed 9W833 to go around and aircraft took a left turn to avoid the conflict.

Probable cause of Incident:
The selection of wrong localizer runway by Air India pilot.
Contributory Factors:
1) The localizer of Runway 09 was kept ‘ON’ position although Runway 09 was being used for departure only.
2) The crew of Air India aircraft did not re-check the localizer frequency in spite of being reminded a number of times about Runway 11 allotted to her.
3) The Approach Controller changed over Air India aircraft to Aerodrome Controller without visually ensuring on situation data display that aircraft is established on localizer of Runway 09.
4) Inadequate Hazard Identification and Risk assessment for mixed mode of operations.
5) Non- availability of appropriately and well documented Standard Operating Procedure in general and for three runway operation in particular.
6) The ATC Automation System annunciated Current Conflict Warning (CCW) did not draw the attention of the controller to the impending situation and lag in response by ATC member for corrective action.


Accident investigation:
Investigating agency: AAIB India
Status: Investigation completed
Duration: 2 years and 8 months
Download report: Final report


At 06:15 UTC, AIC543 crossed the path of JAI833

Revision history:

21-Oct-2018 08:00 harro Added

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