Quote:
Originally Posted by darius359au
Its amazing how many times a multi million dollar accident can be traced back to a 2 dollar part - Apollo 13's explosion was traced back to a 50 cent switch that hadn't been changed when the power requirements for the system had been beefed up or, in this case , a bit of condensation on a sensor 
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We still use the Apollo 13 incident in our system engineering classes. There aint so such thing as a "small" change.