Correct.
Eligible A80 is airborne near the sideline when he receives a legal forward pass. As he comes to the ground facing the field of play, his toe (a) clearly drags the ground inbounds before he falls out of bounds; (b) touches the ground inbounds and then his heel comes down on the sideline in a continuous motion. He maintains firm control of the ball in both cases.
RULING: (a) Complete pass. (b) Incomplete pass. The continuous toe-heel touching is part of a single process and by interpretation he has landed out of bounds, thus not executing a catch.