/usr/lib/x86_64-linux-gnu/libfap.so is in libfap-dev 1.5-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libfap.so.6.0.0
/usr/lib/x86_64-linux-gnu/libfap.so.6.0.0