Monitoring fluid consumption of gas turbine engine during an engine cycle

A method for a gas turbine engine, comprising:

• determining a first lubricant parameter at engine idle prior to an aircraft flight, the first lubricant parameter indicative of a first quantity of lubricant within a reservoir of the gas turbine engine;
• determining a second lubricant parameter at engine idle after the aircraft flight, the second lubricant parameter indicative of a second quantity of lubricant within the reservoir;
• and
• determining a lubricant consumption parameter based on the first lubricant parameter and the second lubricant parameter, the lubricant consumption parameter indicative of a quantity of the lubricant consumed by the gas turbine engine during the aircraft flight.

A system for a gas turbine engine, comprising:

• a lubricant system with a lubricant reservoir;
• a sensor system configured to monitor lubricant within the lubricant reservoir;
• and
• a monitoring system configured to
• determine a first lubricant parameter based on first sensor data received from the sensor system while the gas turbine engine is operating during a first period of an operating cycle of the gas turbine engine, the first lubricant parameter indicative of a first quantity of lubricant within the lubricant reservoir;
• determine a second lubricant parameter based on second sensor data received from the sensor system while the gas turbine engine is operating during a second period of the operating cycle of the gas turbine engine, the second lubricant parameter indicative of a second quantity of lubricant within the lubricant reservoir;
• and
• determine a lubricant consumption parameter based on the first lubricant parameter and the second lubricant parameter, the lubricant consumption parameter indicative of a quantity of the lubricant consumed by the gas turbine engine during the operating cycle.