If the story is correct it was an SA-7, I would think a 7b. Imagine how much better something designed in the last quarter century might do?
A few months ago there was a thread in here about heat seekers and high bypass ratio engines. Those certainly look like high bypass ratio engines to me.
Several times threads have erupted here about the ability of a MANPAD to take down an airliner on take-off. One data point is poor statistics so I am not commenting one way or the other, but here is one that got wacked on climb-out, and managed to go around and land.
T!