"Brake Failure" (luckily still on jack stands)
Along with proper adjustment, be sure the self adjusting hardware is good and moving freely. There are two star adjusters, a left thread and right hand thread, be sure they are on the correct side and the star does not have any stripped teeth.
I was taught the way to adjust when the adjustment is close, is to back up at 5-10 mph and pump the brakes several times.