A333 / A319, en-route, east of Lashio Myanmar, 2017

A333 / A319, en-route, east of Lashio Myanmar, 2017

Summary

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.

Description

On 3 May 2017, an Airbus A330-300 (B-5960) being operated by Sichuan Airlines on a scheduled international passenger flight from Chengdu to Dubai as CSC603 with 253 persons on board and an opposite direction Airbus A319 (B-6202) being operated by China Southern Airlines on a scheduled international passenger flight from Kathmandu to Guangzhou as CSN 6068 with 119 persons on board lost prescribed separation in daylight whilst passing each other on ATS route A599 in eastern Myanmar. The prevailing weather conditions were not recorded.

An AIP extract showing the cover of Mandalay Radar including ATS route A599 on which the conflict occurred. [Reproduced from the Official Report]

Investigation

An Investigation was carried out by the Myanmar Accident/Incident Investigation Bureau (MAIB). Examination of data from the FDR and CVR of the two aircraft involved and the prevailing weather conditions were both recorded by the Investigation as "not applicable".

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