Monitoring an anti-leak valve in a jet engine

Device for monitoring an anti-leak valve of a circuit for supplying oil between an oil reservoir and elements to be lubricated of a jet engine, characterised in that it comprises:

• A sensor capable of measuring oil level values in the reservoir (10), respectively at the beginning and at the end of starting the jet engine,
• A sensor capable of measuring an oil temperature value,
• A calculator capable of calculating the difference between the oil level values in the reservoir at the beginning and at the end of starting the jet engine, to form a measured change in the oil level in the reservoir, determining an estimated change of the oil level in the reservoir depending on the oil temperature value, calculating the difference between the measured change in the oil level in the reservoir and the estimated change of the oil level in the reservoir for the measured temperature value, comparing the difference calculated with a detection threshold, and activating an alarm if the calculated difference is lower than the detection threshold.