Handle assembly for escape hatch

A method of operating an escape hatch of an aircraft, comprising:

• sandwiching a middle cam between an interior cam and an exterior cam, each of the interior cam and the exterior cam having a concave profile surface and a convex profile surface, the middle cam having a notch;
• associating the interior cam with an interior handle and the exterior cam with an exterior handle;
• associating a tumbler having a flag with each of the interior cam and the exterior cam;
• operably coupling the middle cam to an output rod associated with a second flag;
• rotating any one of the interior handle and the exterior handle in a first arc of rotation to cause the flag to be displaced;
• and
• rotating the one of the interior handle and the exterior handle in a second arc of rotation to cause the second flag to be displaced.

A handle assembly for an escape hatch, the handle assembly comprising:

• an interior cam, an exterior cam, and a middle cam sandwiched between the interior cam and the exterior cam, each of the interior cam and the exterior cam having a concave profile section and a curved profile section, the middle cam having a notched profile;
• an interior handle and an exterior handle;
• a shaft passing through each of the interior cam, exterior cam, and middle cam;
• a tumbler comprising a flag, the tumbler having a bearing movable from the concave profile section of at least one of the interior cam and the exterior cam to the curved profile section thereof to unlock the handle assembly;
• and
• an output rod having a first end operatively coupled to the middle cam and a second end operatively coupled to a sleeve associated with a second flag.