Yeah . . . .
. . . it comes under "employment" on the application, if you were paid. If not, you still have to account for your time.
Seeing a "quit" from an airline after only a short time may well raise some eyebrows. Be prepared to explain what happened. It has been suggested that for such situations "To be explained at the interview" should be written in the Reason For Leaving box on the app. Don't give them any reason to reject you until you have a chance to explain it personally.
Good luck with your job search.