Posted for George Braly <gwbraly@gami.com>:

 
        Brian,
 
    "...how likely are we to see conditions you test for..."
 
    Brian,  the DO-160D testing can reveal a lot of problems that are in
fact real world problems.   Yes... there are some things in there that are
un-realistic  (18 gHz at 200volts/meter) but there is a lot that is
significant for people in simple airplanes.
 
    For example, on a recent circuit board design,  we put the board on the
shaker table - - and at very modest levels of vibration, found a resonant
frequency and manageed to pop a power supply filter  off the board in about
10 seconds.  A single re-design and we fixed that problem.      You really don't want that to happen on a dark and rainy night when you
happen to park the RPM at 2373.5 RPM for a few seconds.      Regards,  George