On Sat, May 9, 2009 at 3:58 AM, Mehmet Erol Sanliturk <sanlit...@ttmail.com> wrote: > For example , in an airplane fall-down many years before ( approximately > 110 deaths ) it has > been found that in the automatic pilot software an error situation used a > STOP statement . During landing it caused release of control of the airplane
This happens more often than you think. I watched a few days ago a program about a SAAB military aircraft test pilot that survived 3 airplane crashes. Each crash destroying a $24mil plane. The first two crashes where caused by the on-board software failing - software crashed. They then did some serious software bug fixing and were confident that the software defects are solved. The 3rd crash was caused by the now nervous pilot, over compensating for what the software wanted to do. This overloaded the software with inputs it simply couldn't handle fast enough and the software simply started dropping instructions to try and keep up. Needless to say, that plane crashed as well. After that the pilot stopped being a test pilot for that specific model aircraft, but SAAB did eventually manage to fix all the software bugs. Quite an expensive debugging session. Moral of the story? Test, test and TEST! And when in doubt, test some more! Regards, - Graeme - _______________________________________________ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
