Systems and methods for performing efficient, inexpensive data logging of aircraft sensor data. An example system on board an aircraft includes a plurality of data sources that provide sensor data associated with a plurality of avionic components, a line replaceable processing unit that is in signal communication with the plurality of data sources via one or more databuses, a wireless router connected to the line replaceable processing unit via a data cable and a portable data unit in wireless data communication with the wireless router. The wireless router receives at least a portion of the sensor data from the line replaceable processing unit and sends the received sensor data to the portable data unit.