AAIB investigation to Boeing 787-9 Dreamliner, G-TUIM
Degradation of slat, flap and nose landing gear systems, London Gatwick Airport, 6 July 2018.
Summary:
皇冠体育app aircraft was on approach to Runway 26L at London Gatwick Airport and was being configured to land. After FLAPS 1 was selected, there was a progressive deterioration in normal flight controls, landing gear lowering and nosewheel steering capabilities. 皇冠体育app crew performed a go-around and actioned the relevant checklists. 皇冠体育app aircraft landed safely with FLAPS 20 set but with the nosewheel steering inoperative.
皇冠体育app cause of the system degradation was a failure of the Nose Landing Gear Isolation Valve (NLGIV). Following this event, the manufacturer changed its procedures in relation to the manufacturing and testing of the NLGIV.
Bulletin Addendum:
An addendum was issued concerning this report on 11 April 2019. Full details can be found below and in the May 2019 Bulletin.
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