Miss Pilot S01E07 - Last message to the colleagues in America

Oda fails the test and has to return back to Japan but she never reaches Japan and has disappeared. After a long search they finally get information that she has reached Japan but no one has been able to locate her yet. After their training the group finally return to Japan but what is going to happen to Oda? And why is Shinozaki-san meeting up with Oda's mother?