An example method of verifying avionic data includes establishing a first cyclic redundancy check value associated with a data file. The first cyclic redundancy value is established on an aircraft. The method transmits the data file from the aircraft to a ground system. The method receives a second cyclic redundancy check value associated with the data file. The second cyclic redundancy check value is established by the ground system. The method determines the transmitted data file integrity by comparing the first cyclic redundancy check value to the second cyclic redundancy check value. An example aircraft avionic data verification arrangement includes a collector device that assembles avionic data into a data file that is transmittable to a ground system. A controller is programmed to provide a first cyclic redundancy check value associated with the data file and to identify errors in the data file received by the ground system based on a comparison between the first cyclic redundancy check value and a second cyclic redundancy check value established by the ground system.
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