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    EGT marked as INOP when engine cold

    Couple of weeks ago I noticed that #1 EGT would show a red X when the engine is not running (EGT at ambient temperature). As soon as the engine starts and the temps go up the red X would disappear and it would seem to work fine without any problems for the rest of the flight. Now a few weeks...
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    GPS accuracy

    Hi, I am trying to use the GPS data logged at 1/4 second intervals. However, when I compute the speed vector from the GPS lat/long and pressure alt data I get an interesting pattern (all values in feet per 250ms): DELTA ALT,DELTA VECTOR LENGTH,TAS VECTOR,DELTA DELTA VECTOR LENGTH...
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