Patent ID: 11959791
Assignee: B/E AEROSPACE, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. A method for monitoring a level of waste within a waste tank, the method comprising:
receiving, by a controller, a first signal from a point level sensor indicating the level of waste within the waste tank;
receiving, by the controller, a second signal from a load cell indicating a weight of the aircraft waste tank;
receiving, by the controller, a third signal from a flush counter indicating a number of toilet flushes since a previous service to the aircraft waste tank;
determining, by the controller, whether the point level sensor is faulted;
in response to determining that the point level sensor is faulted, determining, by the controller, whether:
(a) the weight of the aircraft waste tank is between a minimum weight threshold and a maximum weight threshold; and
(b) the number of toilet flushes is greater than a minimum flush threshold; and

in response to both (a) and (b) being true, sending, by the controller, a waste system status signal to a display device onboard an aircraft indicating that the aircraft waste tank is full and
in response to the point level sensor not being faulted, determining, by the controller, whether:
(a) the weight of the aircraft waste tank is between the minimum weight threshold and the maximum weight threshold;
(b) the number of toilet flushes is greater than the minimum flush threshold; and
(c) the first signal indicates that the aircraft waste tank is full; and
in response to (a), (b), and (c) being true, sending, by the controller, the waste system status signal to the display device onboard the aircraft indicating that the aircraft waste tank is full.