B737 / B737, vicinity Geneva Switzerland, 2006

B737 / B737, vicinity Geneva Switzerland, 2006

Summary

On 11 May 2006, B737-700 taking off from Geneva came into close proximity with a Boeing Business Jet (BBJ) on a non revenue positioning flight which had commenced a go around from the same runway following an unstabilised approach. The Investigation attributed the conflict to the decision of ATC to give take off clearance to the departing aircraft when the approach of the inbound aircraft could have been seen as highly likely to result is a go around which would lead to proximity with the slower departing aircraft.

Description

On 11 May 2006, a B737-700 (G-EZJS)being operated by Easyjet on a scheduled passenger flight from Geneva to Luton under R/T call sign EZY 9VM came into close proximity in day VMC with another Boeing 737-700 configured as a Boeing Business Jet(BBJ) being operated on a non revenue positioning flight from Kasos, Greece to Geneva under call sign PTI 747 after it had taken off from runway 05. The BBJ had commenced a go around from an approach to the same runway following an unstabilised approach. The higher speed of the BBJ was such that it rapidly caught up with the departing 737. De-confliction instructions were given and separation increased from a minimum of 0.9 nm horizontally and 100 feet vertically.

Investigation

The event was investigated by the Swiss Air Accident Investigation Bureau. Radar recordings were used as the primary source of data. Close proximity of both aircraft to the ground was found to have inhibited generation of Airborne Collision Avoidance System (ACAS) RAs but it was established that both aircraft had received a TA. The conflict was noted to have occurred between two IFR aircraft in Class 'D' airspace.

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