Temporarily-installed aircraft observer door plug, chair, sonotube ejection and control system

An apparatus comprising a door plug assembly to be used in a temporarily-mounted control system on an aircraft, wherein the door plug assembly comprises:

• a segmented bubble window incorporating a transparent glazing in an upper portion of the bubble, and a door plug kick panel in a lower portion of the bubble;
• a door plug tube port permitting ejection of a sonotube-compliant store from the interior of the aircraft to an exterior of the aircraft;
• and
• a sonotube-ejection system coupled to an interior of the door plug assembly, wherein the sonotube-ejection system is capable of being manipulated via a sonotube hinge between:
• a first position wherein the sonotube-ejection system is coupled to the door plug tube port to eject a sonotube-compliant store from the sonotube-ejection system through the door plug tube port;
• and
• a second position wherein the sonotube-ejection system is stowed along an upper section of the door plug assembly.

A method of installing a door plug assembly on a fuselage of an aircraft comprising:

• removing a door of the aircraft, wherein removal of the door creates an opening in the fuselage of the aircraft;
• attaching a retraction rail assembly to an interior of the fuselage, wherein:
• one or more upper rail support struts of the retraction rail assembly are aligned with aircraft door retraction rail guides on a side of the opening;
• and
• one or more lower sections of the retraction rail assembly are connected to a floor of the aircraft;
• and
• attaching a door plug assembly to the retraction rail assembly, wherein:
• the door plug assembly is adapted to fit the opening;
• and
• the door plug assembly comprises:
• a segmented bubble window incorporating a transparent glazing in an upper portion of the bubble, and a door plug kick panel in a lower portion of the bubble;
• a door plug tube port permitting ejection of a sonotube-compliant store from the interior of the aircraft to an exterior of the aircraft;
• and
• a sonotube-ejection system coupled to an interior of the door plug assembly.