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By default error checking is ON.  Error checking runs when you tap SAVE to save saving a flight entry.  It will check that any fields with flight time do not exceed Duration and make sure all required fields are filled in, if Takeoff/Land and/or Out/In times are entered and the flight is being edited it will validate the duration to warn should a duration recalc be required.  If you have a need to disable error checking you can do so by setting this option to OFF and the flight record will save as entered without performing any validation of your data but is highly discouraged.

Restrict to Active Types

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