Patent ID: 8840068

Claim:
A closing member for an opening that is formed in a panel constituting an outer surface of an airframe of an aircraft, the closing member comprising: a closing member body configured to be disposed on one surface side of the panel to close the opening, the closing member body having an external diameter larger than that of the opening, the closing member body comprising a first layer defining a first surface of the closing member body and a second layer defining a second surface of the closing member body, wherein the first layer comprises a composite material including a carbon fiber and the second layer comprises a metallic material; a clamp member configured to be disposed on the other surface side of the panel, the clamp member having an external diameter larger than that of the opening; and a fastener configured to tighten the closing member body and the clamp member while the panel is held between an outer circumferential portion of the closing member body and an outer circumferential portion of the clamp member, wherein the closing member body is configured to be disposed such that the first surface faces an exterior of the airframe and the second surface faces an interior of the airframe, and an outer circumferential portion of the first layer and an inner circumferential portion of the clamp member abut on each other, and the outer circumferential portion of the clamp member and an inner edge portion of the opening abut on each other, whereby the closing member is electrically connected to the panel through the clamp member.