The AirFarce and it's maintenance on airplanes is a total joke. I got called out to a base which houses E-3 and E-4 (the vice president's airplanes). I won't disclose the name of the base but those near that base know exactly which one I'm talking about.
Long story short they said a GPU (ground power unit) was not working correctly with the aircraft and the aircraft was constantly rejecting the power it was giving. Upon inspection of the GPU I found no fault. Upon inspection of the aircraft I found the aircraft plug loose with wires hanging out of it and the connections on the backside were also loose

I brought this to their attention and guess what their reply was? That aircraft just came out of maintenance

I wish I had the power to deem that aircraft not airworthy but alas there's no such thing when it comes to governmental aircraft