Serious incident Boeing 787-9 Dreamliner G-TUIM, Friday 6 July 2018

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Date:	Friday 6 July 2018
Time:	18:11
Type:	Boeing 787-9 Dreamliner
Owner/operator:	TUI Airways
Registration:	G-TUIM
MSN:	62742/703
Year of manufacture:	2018
Engine model:	GE GEnx-1B70/P2G01
Fatalities:	Fatalities: 0 / Occupants: 364
Other fatalities:	0
Aircraft damage:	None
Category:	Serious incident
Location:	near London Gatwick Airport - United Kingdom
Phase:	Approach
Nature:	Passenger - Scheduled
Departure airport:	Tenerife-Sur Reina Sofia Airport (TFS/GCTS)
Destination airport:	London-Gatwick Airport (LGW/EGKK)
Investigating agency:	AAIB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
The 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. The crew performed a go-around and actioned the relevant checklists. The aircraft landed safely with flaps 20 set but with the nosewheel steering inoperative.
The 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.

Accident investigation: