Easyjet A319 near Geneva on Mar 8th 2016, jammed slats
Last Update: April 27, 2018 / 20:50:00 GMT/Zulu time
On Mar 14th 2016 Switzerland's SUST reported that the occurrence was rated a serious incident, the SUST is investigating the occurrence.
On Apr 27th 2018 the SUST released their brief final factual report in French reporting the crew was preparing for an ILS approach to runway 05 reducing the speed to 200 KIAS when the flaps were selected to position 1 but the slats did not move, the aircraft reverted to alternate law. The crew aborted the approach, selected the flaps back to position 0 and attempted another time to select the flaps to position 1, again without success. The crew subsequently decided to select the flaps to position 3 in order to have the trailing edge flaps out with the slats remaining retracted, the crew computed the approach at 156 KIAS, 25 knots above the normal landing speed. When the gear was selected down the aircraft reverted to direct law and landed safely.
The SUST reported in case both SFCC (Slat Flap Computer) 1 and SFCC 2 failing the aircraft falls back into alternate law (and later, after gear extension into direct law) and cause the autopilot to disconnect. However, the autopilot remained connected, so at least one SFCC continued to work. A failed valve however prevented the switch over between SFCC 1 an SFCC 2. Maintenance initially replaced both SFCCs, the control unit of the hydraulic motor, however the failure remained. When the block valve was replaced, the failure cleared.
This article is published under license from Avherald.com. © of text by Avherald.com.
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