Rubuta ci gaba ga wannan sakin layi - A watan Mayu 1939, CR.42 ya shiga sabis tare da; shi ne na karshe na Fiat biplane mayakan shiga gaban line sabis. A ranar 10 ga Yuni, 1940, ranar da Italiya ta shiga Yaƙin Duniya na Biyu, an ba da kusan 300 na nau'in, wanda ya kare biranen birni da mahimman kayan aikin soja a farkon. A ƙarshen shekara ta 1940, an yi amfani da jirgin Falco a yaƙe-yaƙe dabam-dabam, har da yaƙin Faransa, yaƙin Biritaniya, Malta, Arewacin Afirka, da kuma Hellas
Ka yi haƙuri. A ƙarshen yakin, an yi amfani da Italiyanci CR.42s a kan wasu bangarori, ciki har da Iraki, Gabashin Gabas da kuma ƙasar Italiya. Bayan sanya hannu kan yarjejeniyar armistice ta Italiya tare da Allies a ranar 8 ga Satumba, 1943, an ba da nau'in don amfani da shi a matsayin mai horarwa ta Sojojin Sojan Sama na Italiya, yayin da wasu Jamusawa suka kwace CR.42s na Italiya kuma "Luftwaffe" ya yi amfani da su don aiwatar da ayyukan kai hari.