ASN Wikibase Occurrence # 239131
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| Date: | Thursday 1 November 2018 |
| Time: | 23:52 UTC |
| Type: |  Airbus A330-343 |
| Owner/operator: | THY Turkish Airlines |
| Registration: | TC-LOE |
| MSN: | 1592 |
| Year of manufacture: | 2014 |
| Engine model: | Rolls-Royce Trent 772-B60 |
| Fatalities: | Fatalities: 0 / Occupants: |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | position "D I Khan" (DI) -
 Pakistan
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Istanbul-Atatürk Airport (ISL/LTBA) |
| Lahore-Allama Iqbal International Airport (LHE/OPLA) | |
| Investigating agency: | PakCAA |
| Confidence Rating: |  Accident investigation report completed and information captured |
Turkish Airlines Flight THY714E (Airbus 330-300, TC-LOE) was involved in a serious airprox incident with
Royal Brunei Flight RBA003 (Boeing 787-8, V8-DLB) over Pakistan.
THY714E was maintaining FL390 and operating from Istanbul to Lahore on route N644/A466. At position D I Khan (DI) the aircraft requested descent clearance. The Area Radar Controller West cleared the flight down to FL370 and traffic information was given about Singapore Airline Flight SIA346 which was maintaining FL360.
The Area Radar Controller West subsequently realized that there was another potential conflict with reciprocal traffic at FL380: Royal Brunei Flight RBA003, operating from Brunei to London.
The controller tried to take evasive action by assigning radar vectors and headings to both flights, however both
THY714E and RBA003 already received Resolution Advisores from their Traffic Collision Avoidance Systems and initiated climb and descend respectively.
At the time of minimum vertical separation of about 300 ft, both aircraft were about 5 Nautical miles laterally separated. They crossed each other with a vertical separation of about 1500ft approximately, as both had initiated
TCAS–RA climb and descend respectively.
Cause(s) of Occurrence
1 Lack of situational awareness on part of Duty Air Traffic Controller (Area Radar Controller West) who missed out the immediate reciprocal traffic RBA003 (maintaining FL380) while issuing descent clearance to THY714E and putting more emphasis on another reciprocal traffic (SIA346 maintaining FL360). Whereas this was comparatively
at a larger distance than RBA003 and was not causing immediate concern.
2 Due to lack of situational awareness on part of Duty Air Traffic Controller (Area Radar Controller West) the recommended evasive maneuver was too late and incorrect.
3 Lack of coordination / assistance on the part of Duty Air Traffic Controller (Area Procedure Controller West) for not been able to anticipate the traffic conflict, contributed to the occurrence. This was because he was busy in coordination for another flight (ETD54N) diverting due to medical emergency.
Accident investigation:
 |
|
Sources:
CAA Pakistan
History of this aircraft
Other occurrences involving this aircraft
| 23 August 2017 | TC-LOE | Turkish Airlines | 0 | Istanbul-Atatürk International Airport (IST/LTBA) |  |
unk |
| Bird strike | ||||||
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Aug-2020 17:23 | harro | Added |
Corrections or additions? ... Edit this accident description
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