An aircraft passenger accommodation unit for location adjacent to an aisle in an aircraft cabin, the unit comprising: - a seat , - a shell , at least partially surrounding the seat , wherein the shell defines an opening that allows a passenger egress between the aisle and the seat through the opening , and - a door assembly , for providing variable access through the opening between the aisle and the seat , wherein the door assembly comprises: - a door slidable with respect to the shell between a retracted position , in which the door is at least partially overlapping with the shell to provide access to the opening , and an extended position , in which the door is at least partially non-overlapping with the shell to at least partially close off access to the opening , - a slide track attached to the shell , - a slide runner for sliding along the slide track , and - a connection mechanism for selectively connecting the door to the slide runner , wherein the door has two sliding modes: i) a first sliding mode in which the connection mechanism connects the door to the slide runner and wherein the slide runner slides along the slide track , and ii) a second sliding mode in which the connection mechanism does not connect the door to the slide runner and wherein the door slides in relation to the slide track ; characterised in that the door assembly is provided with a release biasing member that urges the door away from the slide runner . - a seat , - a shell , at least partially surrounding the seat , wherein the shell defines an opening that allows a passenger egress between the aisle and the seat through the opening , and - a door assembly , for providing variable access through the opening between the aisle and the seat , wherein the door assembly comprises: - a door slidable with respect to the shell between a retracted position , in which the door is at least partially overlapping with the shell to provide access to the opening , and an extended position , in which the door is at least partially non-overlapping with the shell to at least partially close off access to the opening , - a slide track attached to the shell , - a slide runner for sliding along the slide track , and - a connection mechanism for selectively connecting the door to the slide runner , - a door slidable with respect to the shell between a retracted position , in which the door is at least partially overlapping with the shell to provide access to the opening , and an extended position , in which the door is at least partially non-overlapping with the shell to at least partially close off access to the opening , - a slide track attached to the shell , - a slide runner for sliding along the slide track , and - a connection mechanism for selectively connecting the door to the slide runner , wherein the door has two sliding modes: i) a first sliding mode in which the connection mechanism connects the door to the slide runner and wherein the slide runner slides along the slide track , and ii) a second sliding mode in which the connection mechanism does not connect the door to the slide runner and wherein the door slides in relation to the slide track ; i) a first sliding mode in which the connection mechanism connects the door to the slide runner and wherein the slide runner slides along the slide track , and ii) a second sliding mode in which the connection mechanism does not connect the door to the slide runner and wherein the door slides in relation to the slide track ; characterised in that the door assembly is provided with a release biasing member that urges the door away from the slide runner . <EOS>