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  • A320 / B738, vicinity Dubai UAE, 2012 (Synopsis: On 22 April 2012, an Airbus A320 and a Boeing 737 came into close proximity near Dubai whilst on the same ATC frequency and correctly following their ATC clearances shortly after they had departed at night from Sharjah and Dubai respectively. The Investigation found that correct response by both aircraft to coordinated TCAS RAs eliminated any risk of collision. The fact that the controller involved had only just taken over the radar position involved and was only working the two aircraft in conflict was noted, as was the absence of STCA at the unit due to set up difficulties.)
  • A320 / C56X, vicinity Geneva Switzerland, 2011 (Synopsis: On 17 August 2012, a Swiss A320 being positioned under radar vectors for arrival at Geneva was inadvertently vectored into conflict with a Cessna Citation already established on the ILS LOC for runway 23 at Geneva. Controller training was in progress and the Instructor had just taken control because of concerns at the actions of the Trainee. An error by the Instructor was recognised and de-confliction instructions were given but a co-ordinated TCAS RA still subsequently occurred. STCA was activated but constraints on access to both visual and aural modes of the system served to diminish its value.)
  • A320 / CRJ2, Port Elizabeth South Africa, 2014 (Synopsis: On 10 July 2014, the crew of a Bombardier CRJ200 on a visual go around from an approach to runway 26 at Port Elizabeth took visual avoiding action overhead of the aerodrome to ensure safe separation from an Airbus A320 which had just taken off. Both aircraft also received TCAS RAs. Minimum achieved separation from radar was 370 metres laterally and 263 feet vertically. The Investigation noted that the go around resulted from the TWR controller, who was supervising a student controller, clearing the A320 to enter the runway and take off when the CRJ200 was on short final to land.)
  • A320/B738, vicinity Delhi India, 2013 (Synopsis: On 2 September 2013, a B737 crew were not instructed to go around from their approach by ATC as it became increasingly obvious that an A320 departing the same runway would not be airborne in time for a landing clearance to be issued. They initiated a go around over the threshold and then twice came into conflict with the A320 as both climbed on similar tracks without ATC de-confliction, initially below the height where TCAS RAs are functional. Investigation attributed the conflict to ATC but the failure to effectively deal with the consequences jointly to ATC and both aircraft crews.)
  • A320/E190/B712, vicinity Helsinki Finland, 2013 (Synopsis: On 6 February 2013, ATC mismanagement of an Airbus A320 instructed to go around resulted in loss of separation in IMC against the Embraer 190 ahead which was obliged to initiate a go around when no landing clearance had been issued due to a Boeing 737-800 still on the runway after landing. Further ATC mismanagement then resulted in a second IMC loss of separation between the Embraer 190 and a Boeing 717 which had just take off from the parallel runway. Controller response to the STCA Alerts generated was found to be inadequate and ANSP procedures in need of improvement.)
  • A321 / B738, en-route, south eastern Bulgaria, 2016 (Synopsis: On 8 September 2016, an Airbus A321 en route in Bulgarian airspace at FL 350 was given and acknowledged a descent but then climbed and came within 1.2nm of a descending Boeing 737. The Investigation found that the inexperienced A321 First Officer had been temporarily alone when the instruction was given and had insufficient understanding of how to control the aircraft. It was also found that despite an STCA activation of the collision risk, the controller, influenced by a Mode ā€˜Sā€™ downlink of the correctly-set A321 cleared altitude, had then added to the risk by instructing the 737 to descend.)
  • A332 / A332, en-route, near Adelaide South Australia, 2013 (Synopsis: On 20 September 2013, a loss of separation occurred between two en route Airbus A330s under radar surveillance in controlled airspace near Adelaide. The potential conflict was resolved with TCAS RA action by one of the aircraft involved but the TCAS equipment on board the other aircraft appeared to have malfunctioned and did not display any traffic information or generate an RA. The complex pattern of air routes in the vicinity of the event was identified by the Investigation as a Safety Issue requiring resolution by the ANSP and the response subsequently received was assessed as satisfactory.)
  • A332 / A333, en-route, North West Australia, 2012 (Synopsis: On 31 March 2012, after the implementation of contingency ATC procedures for a period of 5 hours due to controller shortage, two Garuda A330 aircraft which had been transiting an associated Temporary Restricted Area (TRA) prior to re-entering controlled airspace were separately involved in losses of separation assurance, one when unexpectedly entering adjacent airspace from the TRA, the other when the TRA ceased and controlled airspace was restored. The Investigation did not find that any actual loss of separation had occurred but identified four Safety Issues in relation to the inadequate handling of the TRA activation by ANSP Airservices Australia.)
  • A332 / RJ1H, vicinity Zurich Switzerland, 2004 (Synopsis: On 31 October 2004, a Loss of Separation occurred between an A330-200, on a low go-around from Rwy 14 at Zurich Switzerland, and an Avro RJ100 which had been cleared for take-off on Rwy 10 and was on a convergent flight path.)
  • A332/B738, vicinity Amsterdam Netherlands, 2012 (Synopsis: On 13 November 2012, a Garuda Airbus A330 and a KLM Boeing 737 lost separation against each other whilst correctly following radar vectors to parallel approaches at Amsterdam but there was no actual risk of collision as each aircraft had the other in sight and no TCAS RA occurred. The Investigation found that one of the controllers involved had used permitted discretion to override normal procedures during a short period of quiet traffic but had failed to restore normal procedures when it became necessary to do so, thus creating the conflict and the ANSP was recommended to review their procedures.)
  • A333 / A319, en-route, east of Lashio Myanmar, 2017 (Synopsis: On 3 May 2017, an Airbus A330 and an Airbus A319 lost prescribed separation whilst tracking in opposite directions on a radar-controlled ATS route in eastern Myanmar close to the Chinese border. The Investigation found that the response of the A330 crew to a call for another aircraft went undetected and they descended to the same level as the A319 with the lost separation only being mitigated by intervention from the neighbouring Chinese ACC which was able to give the A319 an avoiding action turn. At the time of the conflict, the A330 had disappeared from the controlling ACCs radar.)
  • A343 / B744, en-route, south of Newfoundland Canada, 1998 (Synopsis: On 20 July 1998, after an ATC error south of Newfoundland, an Air France A340 and an Air Canada 747-400 were on directly converging tracks and at the same level. Collision was avoided by the correct actioning of coordinated TCAS RAs by both aircraft.)