Enhanced rig check and leak detection of aircraft doors

Patent metadata

Field	Value
Publication number	US-11067468-B2
Application number	US-201816019946-A
Country	US
Kind code	B2
Filing date	Jun 27, 2018
Priority date	Jun 27, 2018
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

Systems and methods for leak detection of aircraft doors. One embodiment is an apparatus for leak testing a seal between an aircraft door and a fuselage of an aircraft. The apparatus includes a structural frame that includes a suction cup configured to suction an outer surface of the aircraft door. The structural frame further includes legs to extend in length to push the structural frame away from the fuselage and cause the suction cup to pull the aircraft door toward an outside of the aircraft to tighten the seal between the aircraft door and the fuselage of the aircraft.

First claim

What is claimed is:

1. An apparatus for leak testing a seal between an aircraft door and a fuselage of an aircraft, the apparatus comprising:
a structural frame including:
a suction cup configured to suction an outer surface of the aircraft door;
legs configured to extend in length to push the structural frame away from the fuselage and cause the suction cup to pull the aircraft door toward an outside of the aircraft to tighten the seal between the aircraft door and the fuselage of the aircraft; and
a gasket channel on a bottom side of the structural frame, the gasket channel sized to correspond with an outer periphery of the aircraft door to fluidly couple with the seal between the aircraft door and the fuselage.

2. The apparatus of claim 1 wherein:
the structural frame further includes:
a crossbar sized to straddle the aircraft door outside the aircraft, wherein the crossbar couples with the legs at either end of the crossbar, and wherein the crossbar couples with the suction cup at a location between the legs.

3. The apparatus of claim 1 further comprising:
a pump configured to alter pressure in the gasket channel fluidly coupled with the seal; and
a pressure sensor configured to measure pressure in the gasket channel fluidly coupled with the seal for detecting a leak in the seal.

4. The apparatus of claim 3 wherein:
the gasket channel includes channel segments that each fluidly couple separately with the seal at different portions of the outer periphery of the aircraft door; and
the pressure sensor is configured to indicate a location of the leak based on a difference in pressure in one channel segment relative to others of the channel segments.

5. The apparatus of claim 3 wherein:
the pump includes a vacuum configured to suction the gasket channel fluidly coupled with the seal; and
the pressure sensor is configured to detect the leak in the seal based on a decline of absolute pressure measured in the gasket channel fluidly coupled with the seal during suctioning with the vacuum.

6. The apparatus of claim 1 wherein:
the legs extend a distance that corresponds with a force applied to the aircraft door that simulates inflight cabin pressure of the aircraft.

7. The apparatus of claim 1 wherein:
the legs are attached to end portions of a crossbar of the structural frame; and
the suction cup is attached to a middle portion of the crossbar.

8. The apparatus of claim 1 wherein:
the structural frame including:
a plurality of crossbars with at least one crossbar being extendable for different sizes of the aircraft door; and
one or more suction cups mechanically coupled with one of the crossbars via a joint to pivot the one or more suction cups according to a curvature of the outer surface of the aircraft door.

9. The apparatus of claim 1 wherein:
the structural frame including:
one or more floating mount supports attached to a bottom side of the structural frame, the one or more floating mount supports having springs to provide a spring contact force between the aircraft door and the structural frame to facilitate alignment of the structural frame with respect to the aircraft door while the suction cup pulls the aircraft door.

10. A method for leak testing a seal between an aircraft door and a fuselage of an aircraft, the method comprising:
aligning a structural frame with respect to the aircraft door, the structural frame including a middle section aligning with the aircraft door and support members aligning with the fuselage on different sides of the aircraft door;
coupling the middle section of the structural frame with an outer surface of the aircraft door;
driving the support members of the structural frame to apply a force perpendicular to the fuselage to pull the aircraft door via the coupling and to tighten the seal between the aircraft door and the fuselage;
engaging a gasket channel with an outer periphery of the aircraft door to fluidly couple with the seal;
altering pressure in the gasket channel fluidly coupled with the seal; and
detecting a leak in the seal based on a pressure measurement of the gasket channel fluidly coupled with the seal.

11. The method of claim 10 wherein:
the driving includes extending the support members for a distance that corresponds with an applied force on the aircraft door that simulates inflight cabin pressure of the aircraft.

12. The method of claim 10 wherein:
the coupling includes engaging one or more suction cups attached to the structural frame with the outer surface of the aircraft door, and suctioning the outer surface of the aircraft door via the one or more suction cups and a vacuum.

13. The method of claim 10 further comprising:
detecting a location of the leak in the seal based on segments in the gasket channel at different locations of the outer periphery of the aircraft door.

14. The method of claim 10 wherein:
the altering of the pressure includes suctioning the gasket channel fluidly coupled with the seal with a vacuum.

15. The method of claim 10 wherein:
the aligning of the structural frame with respect to the aircraft door includes adjusting a length of the structural frame from one support member to another support member to span the structural frame across the aircraft door.

16. A system for an aircraft door situated in a fuselage of an aircraft, the system comprising:
a structural frame to engage an outer surface of the aircraft door, the structural frame supported over the aircraft door via support members configured to contact the fuselage of the aircraft at opposing sides of the aircraft door;
a coupler to temporarily couple the structural frame with the aircraft door;
a plurality of gasket channels on the structural frame having a size and shape to engage a gap between the aircraft door and the fuselage outside the aircraft;
one or more pumps fluidly coupled with the plurality of gasket channels to apply a pressure in the gap to simulate pressure applied to a seal between the aircraft door and the fuselage during flight of the aircraft; and
pressure gauges fluidly coupled with the plurality of gasket channels to detect a leak in one or more of the plurality of gasket channels,
wherein the support members are configured to extend to lift the structural frame and draw the aircraft door outwards to simulate a position of the aircraft door relative to the fuselage during flight of the aircraft.

17. The system of claim 16 wherein:
the coupler includes one or more suction cups attached to the structural frame.

18. The system of claim 16 wherein:
the plurality of gasket channels are additively manufactured with a material sized to engage the gap around a perimeter of the aircraft door.

19. The system of claim 16 wherein:
the plurality of gasket channels are segmented to be fluidly isolated from one another.

20. The system of claim 16 wherein:
the support members include tension levers to lift the structural frame.

Assignees

• Boeing Co

Inventors

• Berkey Tyler Emerson
• Gemechu Emnet T

Classifications

• G01M3/26 Primary

  by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors · CPC title

• B64F5/60 Primary

  Testing or inspecting aircraft components or systems · CPC title

• F16J15/102

  characterised by material · CPC title

• G01M3/34

  by testing the possibility of maintaining the vacuum in containers, e.g. in can-testing machines · CPC title

• B64C1/143

  of the plug type · CPC title