Abstract: A substructure in an aircraft cabin includes a drawer-insert accepting portion that defines multiple racks. Each rack may receive an exchangeable drawer insert. A module-accepting portion of the substructure defines an opening that includes a supporting surface, a back wall which extends upward and outward, and a lateral side wall. A module is provided for optionally installing in the module-accepting portion. The module has concealed areas upon installing that include: (i) a base adapted to rest on the supporting surface, (ii) a side wall adapted to abut the lateral side wall, and (iii) a rear wall adapted to abut the back wall. The module also has exposed surfaces upon installing that are adapted to match an existing profile of the drawer-insert accepting portion. The module-accepting portion is configured for stowing cargo in a first mode and for receiving the module in a second mode.

Abstract: An articulating armrest includes a first protrusion and a second protrusion that protrude from a member a predetermined spacing apart. Each protrusion aligns within a separate track within a housing configured for stowing the armrest within a seat back. The two tracks include straight and curved portions configured to articulate the armrest. Specifically, the armrest moves along a curvilinear path between stowed and deployed positions by translating along the tracks and pivoting about the second protrusion. The armrest may stow in a seat back and beneath the seat bottom to provide a full length armrest when deployed, and the armrest may stow flush with the seat back for sitting against. Mechanical tension may be provided to automatically deploy the armrest, and a rotational damper and a gas spring may be used to control the speed at which the armrest deploys.