blows up maintanence buildings

Flave and Over were working on Liberal Arts City’s number three short runway.
“...So how many usable ones are left?”
“Numbers 3, 5, 7, and 8...It seems that electrical princess really does want to make a
deal. She left only the runways that could truly be used.”
“Hey, but didn’t she blow up the hangars with something like lightning?”
“She only did that to the maintenance buildings. The buildings with actual fighters in
them weren’t even scratched. You can tell she was being considerate. ...It makes me
wonder if she’s really an enemy.”

- Toaru Kagaku no Railgun SS1, Chapter 7