Engine monitoring display for maintenance management

• US 6,408,258 B1
• Filed: 12/20/1999
• Issued: 06/18/2002
• Est. Priority Date: 12/20/1999
• Status: Expired due to Term

• Current Assignee: Pratt & Whitney Canada Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Pratt & Whitney Canada Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Richer, Serge
• Primary Examiner(s): SHAH, KAMINI S
• Application Number:
  US09/467,766
• Time in Patent Office: 911 Days
• Field of Search: 702/182, 702/185, 701/29, 701/30, 701/31, 701/320, 701/301, 714/33, 714/736, 324/73.1
• US Class Current: 702/182
• CPC Class Codes: B64F 5/60 Testing or inspecting aircraft components or systems
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling

Abstract

The present invention is directed to a system and method for aircraft engine monitoring to permit management of individual aircraft in a fleet of aircraft. A processing system collects data on engine operational parameters and then uses this data to perform calculations to accurately determine time remaining until service and relative wear of specific engines in the fleet of aircraft. The time remaining until service and relative wear is displayed on a display screen which is configured to display this data for each engine separately. The displayed results can be used by an aircraft maintenance manager to accurately determine if the aircraft engines are being operated according to a maintenance plan, or to rotate the service of the aircraft to balance the wear on the aircraft engines in the fleet.

Claims

1. An aircraft maintenance monitoring display system comprising:

a data storage containing values representing;

at least two aircraft engine current usage parameters;

at least two aircraft engine maximum recommended usage until scheduled maintenance parameters; and

at least two predicted aircraft engine usage parameters corresponding to an amount of aircraft engine usage by a time of scheduled maintenance;

a usage estimation calculator receiving a plurality of variable engine usage parameters from at least one aircraft flight recorder and generating as a first output said aircraft engine current usage parameters and as a second output said predicted aircraft engine usage parameters; and

a graphic display device providing a visual display of said at least two current usage parameters, said at least two maximum recommended usage parameters, and said at least two predicted usage parameters, wherein said visual display allows for comparison of engine usage between at least one of;

engine components in a same engine;

engines on a same aircraft; and

aircraft within a same fleet.

2. The apparatus as claimed in claim 1, wherein said at least two engine components are selected from the group consisting of:

a compressor turbine, a power turbine, and an airflow impeller.

3. The apparatus as claimed in claim 1, wherein said maximum recommended usage parameter represents a hot section inspection.

4. The apparatus as claimed in claim 1, wherein said maximum recommended usage parameter represents an overhaul.

5. The apparatus as claimed in claim 1, wherein said engine usage parameters comprise both engine speed and temperature.

6. A method of monitoring operation of at least one aircraft engine, comprising the steps of:

establishing parameter values for maximum recommended usage until scheduled maintenance for at least two aircraft components;

monitoring operational parameters for said aircraft components during use and recording a plurality of variable engine usage parameters;

analyzing said plurality of variable engine usage parameters to determine current engine usage parameters for said at least two aircraft components and to predict when said scheduled maintenance should be performed;

providing a visual display of said at least two current usage parameters, said at least two maximum recommended usage parameters, and said at least two predicted usage parameters; and

using said display to compare engine usage between at least one of;

engine components in a same engine;

engines on a same aircraft; and

aircraft within a same fleet.

7. The method as claimed in claim 6, wherein said at least two engine components are selected from the group consisting of:

a compressor turbine, a power turbine, and an airflow impeller.

8. The method as claimed in claim 6, wherein said maximum recommended usage parameter represents a hot section inspection.

9. The method as claimed in claim 6, wherein said maximum recommended usage parameter represents an overhaul.

10. The method as claimed in claim 6, wherein said engine usage parameters comprise both engine speed and temperature.

11. A method of monitoring operation of at least one engine, comprising the steps of:

establishing a time schedule of planned maintenance activities for said engine based on an expected use of said engine;

monitoring operational parameters for at least two said aircraft components during use and recording a plurality of variable engine usage parameters;

analyzing said plurality of variable engine usage parameters to determine current engine usage parameters for said at least two aircraft components and to predict when said scheduled maintenance should be performed;

providing an indication of whether a usage of said engine necessitates maintenance ahead of schedule, wherein said step of providing an indication comprises;

establishing parameter values for maximum recommended usage until scheduled maintenance for at least two aircraft components; and

providing a visual display of said at least two current usage parameters, said at least two maximum recommended usage parameters, and said at least two predicted usage parameters; and

using said display to compare engine usage between at least one of;

engine components in a same engine;

engines on a same aircraft; and

aircraft within a same fleet,

whereby by providing an indication as to whether actual operation of the engine over time is compliant with a maintenance plan, an engine operator manages engine operation accordingly.

12. The method as claimed in claim 11, further comprising:

setting a schedule of charges corresponding to the time schedule of planned maintenance activities; and

adjusting, if necessary, the schedule of charges if the usage of the engine necessitates maintenance ahead of schedule.

13. The method as claimed in claim 11, wherein said indication comprises a predicted date and a planned date for said planned maintenance activities.

14. The method as claimed in claim 12, wherein said indication comprises a predicted date and a planned date for said planned maintenance activities.

15. The method as claimed in claim 11, wherein said analyzing comprises:

determining an engine usage value and an engine usage rate value for at least two components of said engine; and

comparing said engine usage value and said engine usage rate value with reference values to predict a time when service of said at least two engine components will be required.

16. A method for managing usage of an aircraft in a fleet of aircraft, comprising the steps of:

establishing parameter values for maximum recommended usage until scheduled maintenance for at least two aircraft components;

monitoring operational parameters for said aircraft components during use and recording a plurality of variable engine usage parameters;

analyzing said plurality of variable engine usage parameters to determine current engine usage parameters for said at least two aircraft components and to predict when said scheduled maintenance should be performed;

providing a visual display of said at least two current usage parameters, said at least two maximum recommended usage parameters, and said at least two predicted usage parameters;

using said display to compare engine usage between at least one of;

engine components in a same engine;

engines on a same aircraft; and

aircraft within a same fleet; and

managing aircraft usage based on said comparing in the previous step.

17. The method as claimed in claim 16, wherein said step of managing aircraft usage comprises the step of selectively rotating usage of said aircraft.

18. The method as claimed in claim 16, wherein said aircraft is a multi-engine aircraft, and said step of managing aircraft usage comprises the step of selectively rotating an engine starting sequence for said multi-engine aircraft.

19. The method as claimed in claim 16, wherein the step of managing aircraft usage comprises the step of selectively rotating pilots flying said aircraft.