I hate to say it, but it is probably the most accurate story about pilot knowledge of the communication systems on the 777. Shutting down the ACARS is not something someone could do without specific training on the 777. Boeing airplanes are pretty standard, but there are major differences in how the ACARS is set up and functions in the 767, 777, and the 747.
If ACARS on say a routine flight quits working or trips a breaker does the crew get any notificiation? Audible or visiual cue?