Abstract: Aspects of this disclosure relate to externally accessible auxiliary power unit (APU) pump assembly, comprising: a pump configured to pressurize an accumulator that is used to start an APU of an aircraft; a pressure gauge for the accumulator; and a support frame configured to be mounted within an outer wall of the aircraft, wherein the support frame defines an externally accessible compartment and secures the pump and the pressure gauge within the externally accessible compartment.

Abstract: Aspects of this disclosure relate to externally accessible auxiliary power unit (APU) pump assembly, comprising: a pump configured to pressurize an accumulator that is used to start an APU of an aircraft; a pressure gauge for the accumulator; and a support frame configured to be mounted within an outer wall of the aircraft, wherein the support frame defines an externally accessible compartment and secures the pump and the pressure gauge within the externally accessible compartment.

Abstract: Aspects of this disclosure relate to a removable fuselage expansion window assembly, comprising: a window panel; an outer window frame; a window bracket configured to secure the window panel to the outer window frame; an inner window frame with an indented rim that is aligned with the window bracket; and a latch assembly located below the indented rim of the inner window frame between the outer window frame and the inner window frame. The latch assembly includes one or more retainers to hold a bottom portion of the removable fuselage expansion window assembly within a rectangular frame formed by vertical and horizontal beams in an outer wall of an aircraft, wherein the latch assembly includes a lever that releases the removable fuselage expansion window assembly by disengaging the one or more retainers from the rectangular frame when the lever is pulled.

Abstract: Aspects of this disclosure relate to a custom aircraft door mounting system that employs a vertical rolling motion enabled assembly, comprising: a first fitting configured to be mounted to an overhead structure of an aircraft, the first fitting including a cam follower slot formed within the first fitting; an elastomeric bearing pivotally coupled to a second fitting; and a cam follower coupled to the elastomeric bearing, the cam follower being configured to slide vertically within the cam follower slot to accommodate relative motion between the second fitting and the overhead structure of the aircraft.