A dual-operation sliding door assembly comprising: a sliding door for a seat unit; a door support member for the seat unit, wherein the sliding door is mounted on the door support member for the seat unit; a dual operation slide device at least partially disposed within the door support member for the seat unit; a primary track engaging the dual operation slide device, wherein the sliding door is movable along the primary track between a retracted position and at least one deployed position in a normal operation mode, the dual operation slide device comprising: an immovable carriage station at least partially disposed within the door support member; a carriage device, wherein the immovable carriage station locks the carriage device into the immovable carriage station, and wherein the primary track slides over the carriage device in the normal operation mode; a secondary track associated with the door support member, wherein the carriage device is unlocked from the immovable carriage station in a backup operation mode permitting the carriage device to slide along the secondary track between the at least one deployed position and the retracted position; a release lever that triggers release of the carriage device from the immovable carriage station in an actuated state; and a mechanical fuse assembly that triggers automatic release of the carriage device from the carriage station in response to a threshold force applied to a back of the sliding door in a direction of the door support member. a sliding door for a seat unit; a door support member for the seat unit, wherein the sliding door is mounted on the door support member for the seat unit; a dual operation slide device at least partially disposed within the door support member for the seat unit; a primary track engaging the dual operation slide device, wherein the sliding door is movable along the primary track between a retracted position and at least one deployed position in a normal operation mode, the dual operation slide device comprising: an immovable carriage station at least partially disposed within the door support member; a carriage device, wherein the immovable carriage station locks the carriage device into the immovable carriage station, and wherein the primary track slides over the carriage device in the normal operation mode; a secondary track associated with the door support member, wherein the carriage device is unlocked from the immovable carriage station in a backup operation mode permitting the carriage device to slide along the secondary track between the at least one deployed position and the retracted position; a release lever that triggers release of the carriage device from the immovable carriage station in an actuated state; and a mechanical fuse assembly that triggers automatic release of the carriage device from the carriage station in response to a threshold force applied to a back of the sliding door in a direction of the door support member. an immovable carriage station at least partially disposed within the door support member; a carriage device, wherein the immovable carriage station locks the carriage device into the immovable carriage station, and wherein the primary track slides over the carriage device in the normal operation mode; a secondary track associated with the door support member, wherein the carriage device is unlocked from the immovable carriage station in a backup operation mode permitting the carriage device to slide along the secondary track between the at least one deployed position and the retracted position; a release lever that triggers release of the carriage device from the immovable carriage station in an actuated state; and a mechanical fuse assembly that triggers automatic release of the carriage device from the carriage station in response to a threshold force applied to a back of the sliding door in a direction of the door support member.