This document analyzes the short story "By Air" using systemic functional grammar. It finds that material processes make up 65% of the processes in the story, with declarative mood making up 75% of the clauses. Marked themes are the most common theme type at 70%. The story is about a boy who used to travel by air frequently to visit his parents in South America, and one flight where the plane had to turn back after takeoff due to an unknown problem that worried the passengers.