The article describes the on-board control-measurement system designed to record the main flight parameters of a convertiplane-type micro unmanned aerial vehicle and the base of elements that make up the system. The temperature, current consumption and number of revolutions of each of the engines, as well as the angle change along the three coordinate axes and acceleration of the glider have been measured and recorded through the on-board control-measurement system in test flights performed in stationary and vertical take-off and landing (VTOL) mode at different times and meteorological conditions. The time dependence graphs of the recorded parameters have been made, and the stationary, take-off, landing and hovering modes of the aerial vehicle were studied based on them. Automated registration of the measured parameters of the power elements in the pre-flight, take-off and landing modes of the convertiplane-type micro UAV in stationary and multicopter flight modes was carried out, and analyzes were carried out on the made graphs. The engine diagnostics and process execution methodologies in stationary as well as VTOL flight modes have also been developed and practically implemented.