Airbus Revises A320 Logic After Touch-And-Go Accident
Airbus is developing a retrofit to reduce the risk of system logic weaknesses that played a role in the SmartLynx A320 touch-and-go accident at Tallinn last year
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November 7, 2019 - by DAVID KAMINSKI-MORROW for flightglobal.com
Airbus is developing a retrofit to reduce the risk of system logic weaknesses that played a role in the SmartLynx A320 touch-and-go accident at Tallinn last year.
While performing touch-and-go circuits for student pilots, the aircraft lost elevator control just after landing, a situation which the crew only discovered as the jet accelerated towards rotation again.
It became airborne as a result of the horizontal stabiliser setting before bouncing heavily on the runway and entering a sharp climb with its engines damaged and elevators inoperable.
Estonian investigation authority OJK found that, during each landing, the instructor pilot had been grasping the trim wheel to prevent the stabiliser from returning to neutral, in order to maintain a take-off setting.
This action would have been observed as a discrepancy between the stabiliser's actual and commanded positions.
In order for this situation not to be interpreted as a runaway, an override mechanism is designed to detect...
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