Component apparatus and method for detecting a damage of a bonding apparatus at a component

The invention relates to a component device (10), in particular for a primary supporting member of an aircraft, comprising a first component element (12), a second component element (14), adhesive bonding (16) a connection between the first component member (12) and the the second component member (14) provides a marker device (18) which is formed in contact with ambient air to deliver a volatile marker gas (30) to the surroundings, and which in an undestroyed bonding (16) by gluing (16), the first component (12) and / or the second component (14) is hermetically sealed from the ambient air, and a detector device (20) which is adapted to detect the signal emitted by the marker means (18) marker gas (30) comprises.