Aircraft water tank and method for manufacturing same

A method for manufacturing an aircraft water tank, the method comprising:

• providing a mouthpiece at a center of a dome portion, the dome portion comprising an inner liner and a fiber-reinforced resin layer,
• the mouthpiece including;
• a tubular portion penetrating through an opening of the inner liner and the fiber-reinforced resin layer and to which a lid is joined, and
• a skirt portion extending radially outward, between the inner liner and the fiber-reinforced resin layer, from an entire outer circumferential portion of the tubular portion and attached around the opening to the inner liner and the fiber-reinforced resin layer with an adhesive;
• wherein
• the inner liner is formed with a first curved surface portion attachable to an inner circumferential surface of the skirt portion and a second curved surface portion located radially outward of the skirt portion;
• the first curved surface portion is attached to the inner circumferential surface of the skirt portion with an identical adhesive as that used in attaching the fiber-reinforced resin layer to the inner liner;
• reinforcing fibers are provided at a portion of the second curved surface portion in a vicinity of an outer circumferential end of the skirt portion via the adhesive expelled from between the inner circumferential surface of the skirt portion and the first curved surface portion radially outward of the skirt portion;
• and
• the adhesive expelled and the reinforcing fibers constitute a reinforcing member for connecting an outer circumferential surface of the skirt portion and the second curved surface portion of the inner liner in a continuous manner.