Passenger seat unit with multi-track sliding door

A passenger vehicle comprising a door assembly, the door assembly comprising:

• a stationary wall portion comprising at least one translation track;
• and
• a door portion comprising at least one channel, wherein the door portion is slidably coupled to the stationary wall portion via at least a carriage member having a first length, the carriage member comprising:
• at least one first protrusion engageable with and arranged within the at least one translation track;
• and
• at least one second protrusion engageable with and arranged within the at least one channel, wherein:
• the at least one first protrusion engageable with and arranged within the at least one translation track is stationarily fixed to the carriage member;
• the at least one second protrusion engageable with and arranged within the at least one channel is stationarily fixed to the carriage member;
• the at least one first protrusion extends from the carriage member in a first direction, the at least one second protrusion extends from the carriage member in a second direction, and the first direction and the second direction are perpendicular;
• the at least one first protrusion and the at least one second protrusion each extends a second length, wherein the first and second lengths are equal;
• and
• both the at least one first protrusion and the at least one second protrusion are T-shaped;
• wherein the door assembly comprises a locked state and an unlocked state;
• wherein in the locked state, the door portion and the carriage member are slidable as a unit relative to the stationary wall portion along the at least one translation track;
• and
• wherein in the unlocked state, the door portion is slidable relative to the carriage member and the stationary wall portion via the at least one second protrusion being movable within the at least one channel.

A method of using an aircraft door assembly comprising a stationary portion comprising at least one translation track and a movable portion comprising at least one channel and being slidably coupled to the stationary portion via at least a carriage member having a first length, the carriage member comprising at least one first protrusion engageable with and arranged within the at least one translation track;

• at least one second protrusion engageable with and arranged within the at least one channel;
• wherein the at least one first protrusion engageable with and arranged within the at least one translation track is stationarily fixed to the carriage member;
• the at least one second protrusion engageable with and arranged within the at least one channel is stationarily fixed to the carriage member;
• wherein the at least one first protrusion extends from the carriage member in a first direction, the at least one second protrusion extends from the carriage member in a second direction, and the first direction and the second direction are perpendicular;
• wherein the at least one first protrusion and the at least one second protrusion each extends a second length, wherein the first and second lengths are equal;
• and both the at least one first protrusion and the at least one second protrusion are T-shaped, the method comprising:
• changing the aircraft door assembly from a locked state to an unlocked state, wherein in the unlocked state the movable portion is slidable relative to the carriage member and the stationary portion and the at least one second protrusion is slidable within the at least one channel of the movable portion;
• and
• sliding the movable portion relative to the carriage member.