Method for detecting a possible fuel leak in an oil circuit of an aircraft engine

A processing device for detecting a possible fuel leak into an oil circuit of an aircraft engine, said aircraft including at least one pair of identical engines equipped with respective oil circuits, said pair of engines being associated with at least one quadruplet of measurements previously acquired in a measurement time during the operation of the engines of the pair and corresponding to a measurement of pressure and a measurement of temperature of the fluid contained in each of the oil circuits of the engines of the pair, the processing device including:

• a determination module, configured to determine a quantity Q representative of a possible operating difference between the engines of the pair, based on the measurement quadruplet,
• a comparison module, configured to compare the quantity Q with a previously determined threshold value, so as to obtain a comparison result,
• a detection module, configured to detect a possible fuel leak into the oil circuit of one of the engines of the pair, based on the comparison result.