/usr/share/scilab/modules/external_objects/ is in scilab-data 5.5.2-2ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/scilab/modules/external_objects/etc/
/usr/share/scilab/modules/external_objects/etc/external_objects.quit
/usr/share/scilab/modules/external_objects/etc/external_objects.start
/usr/share/scilab/modules/external_objects/help/
/usr/share/scilab/modules/external_objects/macros/
/usr/share/scilab/modules/external_objects/macros/!_deff_wrapper.bin
/usr/share/scilab/modules/external_objects/macros/!_deff_wrapper.sci
/usr/share/scilab/modules/external_objects/macros/%_EVoid_p.bin
/usr/share/scilab/modules/external_objects/macros/%_EVoid_p.sci
/usr/share/scilab/modules/external_objects/macros/buildmacros.sce
/usr/share/scilab/modules/external_objects/macros/lib
/usr/share/scilab/modules/external_objects/macros/names
/usr/share/scilab/modules/external_objects/sci_gateway/
/usr/share/scilab/modules/external_objects/sci_gateway/external_objects_gateway.xml
/usr/share/scilab/modules/external_objects_java/etc/
/usr/share/scilab/modules/external_objects_java/etc/external_objects_java.quit
/usr/share/scilab/modules/external_objects_java/etc/external_objects_java.start
/usr/share/scilab/modules/external_objects_java/examples/
/usr/share/scilab/modules/external_objects_java/examples/com/
/usr/share/scilab/modules/external_objects_java/examples/com/foo/
/usr/share/scilab/modules/external_objects_java/examples/com/foo/CircularWindow.java
/usr/share/scilab/modules/external_objects_java/examples/com/foo/Color.java
/usr/share/scilab/modules/external_objects_java/examples/com/foo/Door.java
/usr/share/scilab/modules/external_objects_java/examples/com/foo/House.java
/usr/share/scilab/modules/external_objects_java/examples/com/foo/HouseFactory.java
/usr/share/scilab/modules/external_objects_java/examples/com/foo/IWindow.java
/usr/share/scilab/modules/external_objects_java/examples/com/foo/RectangularWindow.java
/usr/share/scilab/modules/external_objects_java/help/
/usr/share/scilab/modules/external_objects_java/jar/
/usr/share/scilab/modules/external_objects_java/jar/org.scilab.modules.external_objects_java.jar
/usr/share/scilab/modules/external_objects_java/macros/
/usr/share/scilab/modules/external_objects_java/macros/buildmacros.sce
/usr/share/scilab/modules/external_objects_java/sci_gateway/
/usr/share/scilab/modules/external_objects_java/sci_gateway/external_objects_java_gateway.xml