Aircraft comprising: - a structure exhibiting a roof pierced with an opening, - a cover plate, - locking means provided to adopt a locking position in which they hold the cover plate in the closed position in the opening or, alternatively, an unlocked position in which they do not hold the cover plate, and - at least one fall-protection device provided so that when the locking means move into the unlocked position it is in a first position in which it allows movement of the cover plate under the influence of gravity from its closed position to an intermediate position in which the cover plate is suspended from the structure inside the aircraft and then moves from the first position into a second position during the course of which the cover plate moves from the intermediate position into an open position in which it is no longer attached to the structure, the aircraft being characterized in that each fall-protection device comprises: - a shoe fixed to the structure, - a rigid arm exhibiting a first end integral with the shoe and extending from the shoe in a direction substantially perpendicular to gravity, - a first strip fastener fixed on a first face of the rigid arm, - a second strip fastener fixed on a second face of the rigid arm opposite the first face, the length of the second strip fastener being such that by bending about a second end, referred to as the free end, of the arm, it can be folded on the first strip fastener, becoming fixed there in a removable manner along a joining surface, and - a flexible link comprising at one of its ends a first ring provided to be fixed to the arm in the fold of the second strip fastener and, at the other of its ends, a second ring provided to be fixed to the cover plate. - a structure exhibiting a roof pierced with an opening, - a cover plate, - locking means provided to adopt a locking position in which they hold the cover plate in the closed position in the opening or, alternatively, an unlocked position in which they do not hold the cover plate, and - at least one fall-protection device provided so that when the locking means move into the unlocked position it is in a first position in which it allows movement of the cover plate under the influence of gravity from its closed position to an intermediate position in which the cover plate is suspended from the structure inside the aircraft and then moves from the first position into a second position during the course of which the cover plate moves from the intermediate position into an open position in which it is no longer attached to the structure, the aircraft being characterized in that each fall-protection device comprises: - a shoe fixed to the structure, - a rigid arm exhibiting a first end integral with the shoe and extending from the shoe in a direction substantially perpendicular to gravity, - a first strip fastener fixed on a first face of the rigid arm, - a second strip fastener fixed on a second face of the rigid arm opposite the first face, the length of the second strip fastener being such that by bending about a second end, referred to as the free end, of the arm, it can be folded on the first strip fastener, becoming fixed there in a removable manner along a joining surface, and - a flexible link comprising at one of its ends a first ring provided to be fixed to the arm in the fold of the second strip fastener and, at the other of its ends, a second ring provided to be fixed to the cover plate.