A319 / B738 / B738, en-route, near Lausanne Switzerland, 2013

A319 / B738 / B738, en-route, near Lausanne Switzerland, 2013

Summary

On 26 May 2013, an A319 in Swiss Class 'C' airspace received a TCAS 'Level Off' RA against a 737 above after being inadvertently given an incorrect climb clearance by ATC. The opposing higher-altitude 737 began a coordinated RA climb from level flight and this triggered a second conflict with another 737 also in the cruise 1000 feet above which resulted in coordinated TCAS RAs for both these aircraft. Correct response to all RAs resulted in resolution of both conflicts after prescribed minimum separations had been breached to as low as 1.5nm when 675 feet apart vertically.

Description

On 26 May 2013, an Airbus A319 (G-EZAU) being operated by EasyJet on a scheduled passenger flight from Milan Malpensa to London Luton as EZY 899B received a TCAS RA against conflicting traffic whilst climbing to FL 380 in accordance with its ATC clearance in Swiss Class 'C' airspace. The aircraft above, a Boeing 737-800 (D-ABKB) being operated by Air Berlin on a scheduled flight from Nuremberg to Palma de Majorca as BER17Z and level at FL370 received a coordinated TCAS RA to climb which, when actioned, resulted in a further TCAS RA due to conflicting traffic above level at FL 380. This traffic was a Boeing 737-800 (G-TAWF) being operated by Thomson Airways on a scheduled passenger flight from Hurghada to East Midlands UK as TOM 857. Loss of prescribed separation occurred between the Air Berlin aircraft and both the others involved. This occurred in day VMC.

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