A foldable boarding ramp is operatively connected to a door opening
provided in a body and is selectively extendable to the ground. The
foldable boarding ramp is stored in a folded state inside a fairing
covering a connecting portion between the body and a main wing. Thus, a
reduction in the space of a passenger compartment and a cargo compartment
due to the storage of the folded boarding ramp is prevented. In addition,
an increase in air resistance can be suppressed without providing a
dedicated fairing for covering the boarding ramp. Further, an
interlocking member connects together a door for opening and closing the
door opening and the boarding ramp when the door is opened. The boarding
ramp may be automatically deployed to improve convenience.