From SKYbrary Wiki
| Summary
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| On 29 December 2006, take off clearance for an Easyjet B737-700 which had been lined up ready for a night departure from Geneva was delayed whilst a business jet which had just landed cleared the runway. Take off clearance was given when further landing traffic, A KLM Cityhopper F100, was at IMC at a range from touchdown of 2nm finals. When the F100 became visual at 350 ft agl, the flight crew did not notice the accelerating B737 on the runway. As the B737 was nearing V1, ATC cancelled the take off clearance and instructed the F100 to make a non standard missed approach involving a turn off the runway extended centreline. The B737 continued the take off, subsequently advising that it had been considered inappropriate to make the high speed rejected take off which would have been required.
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| Event Details
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| When
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December 2006
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| Event Type
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HF, LOS
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| Day/Night
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Night
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| Flight Conditions
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IMC
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| General
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| Tag(s)
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Aircraft-aircraft near miss
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| HF
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| Tag(s)
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ATC clearance error
Inappropriate ATC Communication
Ineffective Monitoring
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| LOS
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| Tag(s)
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Required Separation not maintained
ATC Error
Near Miss
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| Outcome
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| Damage or injury
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No
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| Causal Factor Group(s)
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| Group(s)
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Air Traffic Management
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| Safety Recommendation(s)
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| Group(s)
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None Made
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| Investigation Type
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| Type
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Independent
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Description
On 29 December 2006, take off clearance for an Easyjet B737-700 which had been lined up ready for a night departure from Geneva was delayed whilst a business jet which had just landed cleared the runway. Take off clearance was given when further landing traffic, A KLM Cityhopper F100, was at IMC at a range from touchdown of 2nm finals. When the F100 became visual at 350 ft agl, the flight crew did not notice the accelerating B737 on the runway. As the B737 was nearing V1, ATC cancelled the take off clearance and instructed the F100 to make a non standard missed approach involving a turn off the runway extended centreline. The B737 continued the take off, subsequently advising that it had been considered inappropriate to make the high speed rejected take off which would have been required.
The Investigation
An AIRPROX Investigation was carried out by the Swiss BEA/BFU and the Final Report was published on 9 April 2008. The Findings of the Investigation included the following:
- According to the radar recordings, the minimum distances between the two aircraft were a lateral separation of 1 NM and an altitude difference of 300 ft.
- The ICAO considers that an ATC order to abort take-off during the acceleration phase is an emergency procedure.
The Investigation attributed the occurrence to “critical convergence between an aircraft in the final approach phase and an aircraft taking off, following inappropriate traffic management and the non-compliance with an order to abort take-off given by aerodrome control.”
Related Articles
Further Reading
