AAIB investigation to Boeing 787-9 Dreamliner, G-TUIM

Degradation of slat, flap and nose landing gear systems, London Gatwick Airport, 6 July 2018.

• From: Air Accidents Investigation Branch
• Published: 14 February 2019
• Last updated: 11 April 2019 — See all updates

• Category: Commercial - fixed wing
• Report type: Bulletin - Correspondence investigation
• Date of occurrence: 6 July 2018
• Aircraft type: Boeing 787-9 Dreamliner
• Location: London Gatwick Airport
• Registration: G-TUIM

Summary:

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.

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.

Boeing 787-9 Dreamliner, G-TUIM Addendum 05-19

Download amended report, including addendum:

Boeing 787-9 Dreamliner, G-TUIM 02-19

Download glossary of abbreviations:

Glossary of abbreviations

Published 14 February 2019
Last updated 11 April 2019 + show all updates

1. 5 April 2019

   Addendum added to the report.

2. 14 February 2019

   First published.