But just before it did, Mugino saw what was there.

A service tractor and a long narrow bomb packed in what looked like a large pipe were in the place she had fired on. On top of those was a wireless headset that was set at its highest volume so the sound would escape into the surrounding area and a fiberscope with a wireless LAN that would be used for aircraft maintenance.

She didn’t have time to think about it.

Before she could think a single thought, the 200 kg bomb that she herself had struck with intense heat split open and created a large explosion that enveloped the other bombs, the missiles, and the airplane fuel.

[...]

She had fired Meltdowner like a rocket engine. She must have escaped the 200 kg bomb the same way. With the sound of a blunt weapon being swung, Mugino moved outside of his vision.

Toaru Majutsu no Index vol.19 ch.4 pt.4