AAIB investigation to Jetstream 4100, G-MAJW
Landing gear indication fault leading to turnback and emergency evacuation, Aberdeen Airport, 27 February 2018.
Summary:
On the approach to Sumburgh Airport, the primary and standby landing gear status indicators showed that the nose landing gear was not extended and downlocked. The crew aborted the approach, elected to return to Aberdeen and after unsuccessfully attempting to resolve the issue, declared a MAYDAY. The aircraft landed safely at 1235 hrs and the occupants evacuated via the overwing exits after the aircraft stopped on the runway.
A subsequent ground inspection of the aircraft confirmed that the nose landing gear was ‘down and locked’ but the primary indication wiring harness had failed and the standby indication microswitch was out of position. Safety actions have been taken by the manufacturer and the operator to improve the reliability of the system and the clarity of the Emergency and Abnormal Checklists.
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