Detecting a fuel jettison event

Patent metadata

Field	Value
Publication number	US-11046453-B2
Application number	US-201916281479-A
Country	US
Kind code	B2
Filing date	Feb 21, 2019
Priority date	Feb 21, 2019
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

Disclosed herein is a method that comprises detecting that a rate of decrease in fuel quantity for an aircraft exceeds a previously-determined baseline rate of decrease in fuel quantity for the aircraft by a threshold rate during a corresponding segment of flight of the aircraft. The method also comprises determining that a fuel jettison setting for the aircraft is enabled in response to the detected increase in the rate of decrease in fuel quantity. The method further comprises determining that an angle of one or more flaps of the aircraft satisfies a threshold angle. The method additionally comprises generating an alert indicating possible fuel contamination of the one or more flaps due to jettisoned fuel.

First claim

What is claimed is:

1. A method, comprising:
detecting that a rate of decrease in fuel quantity for an aircraft exceeds a previously-determined baseline rate of decrease in fuel quantity for the aircraft by a threshold rate during a corresponding segment of flight of the aircraft;
determining that a fuel jettison setting for the aircraft is enabled in response to a detected increase in the rate of decrease in fuel quantity;
determining that an angle of one or more flaps of the aircraft satisfies a threshold angle; and
generating an alert indicating possible fuel contamination of the one or more flaps due to jettisoned fuel.

2. The method according to claim 1 , further comprising determining the baseline rate of decrease in fuel quantity based on historical fuel quantity data associated with the aircraft and flight of the aircraft.

3. The method according to claim 2 , further comprising:
tracking a real-time fuel quantity for the aircraft over time during flight of the aircraft;
calculating a slope of a first curve for the fuel quantity for the aircraft and the rate of decrease in the fuel quantity for the aircraft based on the calculated slope of the first curve;
calculating a slope of a second curve for the historical fuel quantity data and the baseline rate of decrease in fuel quantity for the aircraft based on the calculated slope of the second curve; and
comparing the calculated rate of decrease in the fuel quantity for the aircraft to the determined baseline rate of decrease in fuel quantity for the historical data to determine whether a difference in the rates of decrease in the fuel quantities satisfies the threshold rate.

4. The method according to claim 3 , further comprising:
detecting a change in the slope of the first curve for the fuel quantity of the aircraft that satisfies a slope change threshold;
in response to the slope of the first curve satisfying the slope change threshold, periodically calculating the slope of the first curve at different intervals until the slope of the first curve is substantially similar to the slope of the first curve prior to the detected change in the slope; and
averaging the slope of the first curve for the different intervals, the average slope indicating the rate of decrease in the fuel quantity for the aircraft.

5. The method according to claim 4 , further comprising ignoring the detected change in the fuel quantity of the aircraft in response to the detected change in the slope of the first curve for the fuel quantity of the aircraft not satisfying the slope change threshold.

6. The method according to claim 1 , wherein the fuel jettison setting for the aircraft is an automatic fuel jettison setting such that when the automatic fuel jettison setting is enabled, fuel is automatically jettisoned from the aircraft based on one or more conditions associated with the aircraft.

7. The method according to claim 1 , further comprising monitoring and tracking the angle of the one or more flaps during the aircraft's flight.

8. The method according to claim 1 , further comprising generating a report in response to the alert that includes information related to the possible fuel contamination of the one or more flaps, the report comprising one or more of an amount of fuel that may have contaminated the one or more flaps, the angle that the one or more flaps were set, an altitude of the aircraft when the fuel may have contaminated the flaps, a speed of the aircraft when the fuel may have contaminated the flaps, and an estimated amount of time that the fuel may have contaminated the flaps.

9. The method according to claim 1 , wherein the threshold angle for the one or more flaps is at least 20 degrees.

10. The method according to claim 9 , wherein the threshold angle for the one or more flaps is at least 30 degrees.

11. An apparatus, comprising:
a processor; and
a memory that stores code executable by the processor to:
detect that a rate of decrease in fuel quantity for an aircraft exceeds a previously-determined baseline rate of decrease in fuel quantity for the aircraft by a threshold rate during a corresponding segment of flight of the aircraft;
determine that a fuel jettison setting for the aircraft is enabled in response to a detected increase in the rate of decrease in fuel quantity;
determine that an angle of one or more flaps of the aircraft satisfies a threshold angle; and
generate an alert indicating possible fuel contamination of the one or more flaps due to jettisoned fuel.

12. The apparatus according to claim 11 , wherein the code is further executable by the processor to determine the baseline rate of decrease in fuel quantity based on historical fuel quantity data associated with the aircraft and flight of the aircraft.

13. The apparatus according to claim 12 , wherein the code is further executable by the processor to:
track a real-time fuel quantity for the aircraft over time during flight of the aircraft;
calculate a slope of a first curve for the fuel quantity for the aircraft and the rate of decrease in the fuel quantity for the aircraft based on the calculated slope of the first curve;
calculate a slope of a second curve for the historical fuel quantity data and the baseline rate of decrease in fuel quantity for the aircraft based on the calculated slope of the second curve; and
compare the calculated rate of decrease in the fuel quantity for the aircraft to the determined baseline rate of decrease in fuel quantity for the historical data to determine whether a difference in the rates of decrease in the fuel quantities satisfies the threshold rate.

14. The apparatus according to claim 13 , wherein the code is further executable by the processor to:
detect a change in the slope of the first curve for the fuel quantity of the aircraft that satisfies a slope change threshold;
in response to the slope of the first curve satisfying the slope change threshold, periodically calculate the slope of the first curve at different intervals until the slope of the first curve is substantially similar to the slope of the first curve prior to the detected change in the slope; and
average the slope of the first curve for the different intervals, the average slope indicating the rate of decrease in the fuel quantity for the aircraft.

15. The apparatus according to claim 14 , wherein the code is further executable by the processor to ignore the detected change in the fuel quantity of the aircraft in response to the detected change in the slope of the first curve for the fuel quantity of the aircraft not satisfying the slope change threshold.

16. The apparatus according to claim 11 , wherein the fuel jettison setting for the aircraft is an automatic fuel jettison setting such that when the automatic fuel jettison setting is enabled, fuel is automatically jettisoned from the aircraft based on one or more conditions associated with the aircraft.

17. The apparatus according to claim 11 , wherein the code is further executable by the processor to monitor and track the angle of the one or more flaps during the flight of the aircraft.

18. The apparatus according to claim 11 , wherein the code is further executable by the processor to generate a report in response to the alert that includes information related to the possible fuel contamination of the one or more flaps, the report comprising one or more of an amount of fuel that may have contaminated the one or more flaps, the angle that the one or more flaps were set, an altitude of the aircraft when the fuel may have contaminated the flaps, a speed o

Assignees

• Boeing Co

Inventors

• Nakhjavani Omid B
• Mazarek Mark A
• Wang Changzhou

Classifications

• B64D37/26

  Jettisoning of fuel · CPC title

• B64D2045/0085

  Devices for aircraft health monitoring, e.g. monitoring flutter or vibration · CPC title

• B64D45/00 Primary

  Aircraft indicators or protectors not otherwise provided for · CPC title

• Y02T50/40

  Weight reduction · CPC title