The Jump Jet is a heavily-armored military jet financed by S.H.I.E.L.D., provided by Red Hulk and used by S.M.A.S.H. that is piloted by She-Hulk.
A running gag of the series is the repeated destruction of the Jump Jet on multiple occasions. The exact count of trashed Jump Jets being lost by the characters themselves.
This is later played with when the black box, the only part salvaged from the repeated crashes, is given sentience by the Leader, causing the Jump Jet to try and take revenge on the S.M.A.S.H. team for its repeated destruction in a manner not unlike HAL 9000 from 2001: A Space Odyssey.