There's a local Spanish Christian music LPFM here in my city, that up until a bit over a month ago sometimes broadcast dead air for weeks at a time. I finally got tired of it broadcasting dead air for weeks at a time, and found their phone number. I then sent them a text (in English), and they fixed the music. Thankfully the person who has the number listed with the FCC knows English and even replied back with a thank you message.
Now whenever the LPFM near me starts broadcasting dead air, I just shoot them a text. It started playing music less than 30 minutes after the last time I heard it quiet. I have a feeling that, without me, it would take lots more time for them to notice.
As for KRUT-LP 94.9's phone number it's here at this page.
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