Patent ID: 8684216

Claim:
A closing member for an opening formed on a panel configuring an outer surface of an airframe of an aircraft, the closing member comprising: a closing member body placed on one surface side of the panel and having an external dimension larger than an external dimension of the opening to close the opening; a ring-shaped clamp member placed on an other surface side of the panel and having an external dimension larger than the external dimension of the opening; and a fastener fastening the closing member body and the clamp member together, with the panel being interposed between an outer peripheral part of the closing member body and an outer peripheral part of the clamp member, and the closing member comprising a first spacer and a second spacer lied between the outer peripheral part of the closing member body and a facing surface facing the outer peripheral part around the opening, the first spacer being interposed between the outer peripheral part of the closing member body and the facing surface, with the opening closed with the closing member body, and the second spacer being interposed between the outer peripheral part of the closing member body and the facing surface at least in a state in which the first spacer has fallen off, wherein, with the first spacer being interposed between the outer peripheral part of the closing member body and the facing surface, the second spacer has a clearance between the outer peripheral part of the closing member body and the facing surface.