Turbine engine oil tank, method for measuring level, and computer program

An aircraft turbojet engine, comprising:

• a tank for containing a liquid, the tank comprising:
• an external wall with an internal surface and an external surface;
• an inner chamber for containing the liquid and delimited by the inner surface of the external wall;
• and
• a measurement system for measuring the level of liquid in the tank;
• wherein the measurement system comprises:
• a submersible portion along the internal surface of the external wall;
• a clearance separating the submersible portion from the internal surface;
• and
• a detector of liquid configured to emit a signal towards the submersible portion through the clearance, said signal being modified by the presence of liquid in the clearance;
• wherein the aircraft is configured to operate with negative vertical acceleration.

A method for measuring a level of liquid in an oil tank, the method comprising:

• (a) filling of the tank with the liquid;
• (b) measuring the level of the liquid in the tank with a level measuring system comprising:
• a submersible portion facing the internal surface of the external wall of the tank;
• a clearance separating the submersible portion from the internal surface;
• and
• a detector of liquid;
• wherein during the measuring step (b), the detector of liquid generates a signal through the clearance, respectively through the liquid in the presence of said liquid in the clearance, the signal being modified by the liquid when said signal crosses said clearance.