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. <EOS>