Backcourt question (sorry)

[Nevadaref]

Originally Posted by Hardwood

A1 has the ball for a throw-in in A's front court. He passed the ball toward the backcourt. A2 jumps from the front court and secures the ball while in the air and turns and passes (without touching the floor) to a team mate (A3) who is standing in the back court. Violation? Play on?

Straight from last year's part 1 exam.

100.	It is a violation if, on A1's throw-in pass. A2 jumps from A's frontcourt and while airborne, catches the throw-in and immediately passes to A3, who is standing in A's backcourt. True 9-9-1; 4-12-2