Incident to the Embraer ERJ170 registered F-HBXI operated by Hop! on 11/05/24 at Toulouse

When the landing gears were extended during the first approach to Toulouse-Blagnac airport, the locking-stay bracket was separated from the left main landing gear, causing the misalignment of the gear position sensors. This misalignment led to the "gear locked" position not being detected and the triggering of the corresponding warning in the cockpit.

The captain, who was the PM, retracted and extended the landing gear as a reflex, without referring to the procedure associated with the warning. As the warning was still present after recycling the landing gear, the crew aborted the approach and complied with the procedure. They flew a large left-hand circuit under radar vectors.

Six minutes after the go-around, the procedures associated with the fault had been completed. The captain took the role of PF.

The final approach and landing were uneventful. However, the "LANDING GEAR" warning remained active from the selection of the flap 5 configuration during the intermediate approach until after landing. The persistence of this warning is explained by an error during an action on the aural warning circuit breaker (see paragraph 2.5) combined with the near impossibility of performing a visual cross-check of the position of the pulled circuit breakers.