Aircraft washer

1. An aircraft pipe coupling comprising:

a first pipe end and a second pipe end, and

a locking washer disposed between the first pipe end and second pipe end, the locking washer comprising:

a first tab in engagement with a nut on the first pipe end, and

a second tab in engagement with a nut on the second pipe end,

a main body abutting a front surface of one of the nuts, wherein the main body and the front surface are parallel to a plane perpendicular to an axis of at least one of the first and second pipe ends, and the main body is separated by a gap from the other of the nuts;

wherein the first tab and/or second tab of the locking washer is deformable to allow the engagement of the tab with the appropriate pipe end, and

wherein at least one of the first tab and second tab is arranged to be more easily deformed in a particular direction.

2. The aircraft pipe coupling as claimed in claim 1 , wherein the main body has an aperture through which the first pipe end and second pipe end are joined, and the first tab and/or second tab extend approximately perpendicular to the plane.

3. The aircraft pipe coupling as claimed in claim 1 , comprising a drain port connected to the first pipe end and a drain pipe connected to the second pipe end.

4. The aircraft pipe coupling as claimed in claim 1 , comprising a drain configured to remove water from a slat track housing.

5. The aircraft pipe coupling as claimed in claim 1 , wherein the locking washer comprises one or more further tabs configured for engagement with the first pipe end or second pipe end.

6. The aircraft pipe coupling as in claim 1 , wherein the first and second pipe ends are hollow, and the first pipe end is inserted into the second pipe end.

7. The aircraft pipe coupling as in claim 6 , wherein the first and second pipe ends have a common axis.

8. An aircraft pipe coupling comprising:

a first pipe having a first pipe end with a threaded outer surface;

a second pipe having a second pipe end with a threaded outer surface, wherein the second pipe end is inserted into the first pipe end to establish an internal passage extending from the first pipe to the second pipe;

a first nut mounted to the threaded outer surface of the first pipe end;

a second nut mounted to the threaded outer surface of the second pipe end;

a locking washer between the first nut and the second nut, wherein the locking washer comprises:

a main body including an aperture, wherein the main body abuts against one of the first and second nuts, and is separated by a gap from the other of the first and second nuts, and wherein at least one of the first pipe end and the second pipe end extends through the aperture;

a first tab extending from and outward of the main body, wherein the first tab is bent out of a plane of the main body and abuts the first nut, wherein the plane is perpendicular to an axis of at least one of the first pipe end and second pipe end; and

a second tab extending from and outward of the main body, wherein the second tab is bent out of the plane of the main body and abuts the second nut, and wherein the second tab is bent in a direction with respect to the plane opposite to a direction in which the first tab is bent.

9. The aircraft pipe coupling of claim 8 , wherein the main body includes opposite planar surfaces both parallel to the plane.

10. The aircraft pipe coupling of claim 8 , wherein the plane of the main body is perpendicular to a common axis of both the first pipe end and the second pipe end.

11. The aircraft pipe coupling of claim 8 , further comprising a drain port connected to one of the first pipe and the second pipe, and a drain pipe connected to the other of the second pipe and the first pipe.

12. The aircraft pipe coupling as claimed in claim 8 , wherein the locking washer includes an additional tab configured to be bent and abut either the first or second nut.