this reminds me of the downed copter during the Carter failed rescue attempt.
Very different situation in that one. The helis weren't shot down during the Iran rescue attempt. Mechanical failures and weather (the haboob sandstorm) caused the abort decision, then a helicopter crashed into a C-130 while attempting to hovertaxi and that caused the casualties.
I'd say that this C-130 being shot down is a lot more similar to the crash of the Chinook that was attempting the rescue during Operation Redwing (as detailed in Marcus Luttrell's book Lone Survivor). This might be the shootdown that kgbsquirrel is referring to?