Aircraft interior lavatory

A lavatory unit for a cabin of an aircraft, comprising:

• an aft wall;
• and
• a forward wall comprising:
• an upper portion;
• a lower portion;
• a middle portion below the upper portion defining an upper recess aftward of at least a portion of the lower portion;
• wherein the upper recess is adapted to receive at least a portion of the exterior aft surface of a seat back of a seat immediately forward of the forward wall;
• wherein the lower portion of the forward wall is adapted to receive at least a portion of a seat support of the seat aftward of at least a portion of the lower portion for mounting the seat support to the aircraft;
• and
• wherein the forward wall is configured to be positioned adjacent a structure within the cabin without a gap and accept loads from the structure.

A lavatory for a cabin of an aircraft, the cabin having an aircraft passenger seat positioned forward of and adjacent to the lavatory, the lavatory comprising:

• an aft wall;
• and
• a forward wall, wherein an interior of the lavatory is disposed between the aft wall and the forward wall, the forward wall comprising:
• an upper portion;
• a middle portion defining an aft-extending upper recess below the upper portion, the middle portion including a flat portion;
• a lower portion below the middle portion;
• wherein the lower portion comprises a downward extending vertical portion, and wherein a seat support of the aircraft passenger seat is secured aft of the downward extending vertical portion, the seat support configured to interface with a floor of the cabin and hold a seat bottom of the aircraft passenger seat in an elevated position.