Abstract: A pilot, commander, or user within an aircraft may ask a query via voice. The query may be converted into text and used to search a knowledge graph. The result from the query may be provided to the user such that the user may obtain improved situational awareness during a mission or otherwise while flying. A line-replaceable unit of the aircraft may execute an architecture for searching the knowledge graph. The knowledge graph may include a schema based, at least in part, on a mission requirement of an aircraft and one or more aircraft systems of the aircraft. Thus, the user may ask for the effect of various sensors or components of the aircraft systems as it relates to the mission.

Abstract: A combination valve for relieving pressure and vacuum conditions in a pressurizable tank includes an elongated rod with a spring seat thereon, a body member sealingly securable to the tank, a cover member secured for axial movement with the rod, a spring mounted between the body member and rod so as to yieldably urge the rod and cover member toward the body member, and an O-ring rollably disposed in a groove in the body member. The width of the O-ring is substantially less than the width of the groove such that the O-ring is rollable within the groove between the body member and the cover member. A seal member mounts on the rod and extends between the cavity and the cover member so as to normally sealingly engage the cover member and cover the vent. In a vacuum venting mode, the flexible seal member is suctioned away from the cover member and the vents therein in response to a predetermined vacuum present in the tank. The air can then be drawn into the tank through the vent.