Cargo door electrical control and warning indication system and method of use

An indication system for an aircraft, said indication system comprising:

• a closure member system positionable in an opened position, a closed position, a closed and latched position, and a closed, latched, and locked position relative to an opening of the aircraft;
• a first closed sensor and a second closed sensor each coupled between said closure member system and the aircraft, said first closed sensor and said second closed sensor each independently operable to output a signal when said closure member system is in said closed position;
• a first latched sensor and a second latched sensor each coupled between said closure member system and the aircraft, said first latched sensor and said second latched sensor each independently operable to output a signal when said closure member system is in said closed and latched position;
• a first locked sensor and a second locked sensor each coupled between said closure member system and the aircraft, said first locked sensor and said second locked sensor each independently operable to output a signal when said closure member system is in said closed, latched, and locked position;
• and
• a dual channel logic system operably coupled to each of said sensors, said dual channel logic system outputting a discrete warning in response to said signals of each of said sensors.

A method of indicating a position of a cargo door system of an aircraft, said cargo door system being positionable in an opened position, a closed position, a closed and latched position, and a closed, latched, and locked position relative to an opening of said aircraft;

• said method comprising:
• outputting a first closed signal and a second closed signal when the cargo door system is in said closed position;
• outputting a first latched signal and a second latched signal when the cargo door system is in said closed and latched position;
• outputting a first locked signal and a second locked signal when the cargo door system is in said closed, latched, and locked position;
• outputting an air/ground signal when the aircraft is on the ground;
• analyzing the particular combination of said first closed signal, said second closed signal, said first latched signal, said second latched signal, said first locked signal, and said second locked signal to positively determine the position of said cargo door system and produce a position signal;
• and
• selectively outputting warnings in response to said position signal.