In order to solve the efficiency problems of a braking assistance device, the invention comprises making the same in the form of a hydraulic control.

Without hydraulic pressure assistance, he flew a first low-altitude tight pattern, culminating in a landing.

Consequently, his previous flight experience might have prompted him to not fully follow the procedure for hydraulic failure and to fly at low speed near the ground without hydraulic pressure assistance.

In this occurrence, the pilot in training had just completed his technical ground training on the AS350 and knew the procedure for hydraulic failure as well as the risks associated with flying without hydraulic pressure assistance.

Activation of the HYD CUT OFF switch opens the actuator solenoid valves of each servoactuator accumulators and depressurizes the accumulators for flight without hydraulic pressure assistance.