Hi Rolf, I've uploaded the .bin file. Seems like the dataflash logs can only be downloaded when the pixhawk is unarmed. I first set it to MANUAL mode and increased the throttle and then decreased the throttle. I repeated the same steps after setting flight mode to Q_STABILIZE. In manual mode, the servo output in mission planner will respond to the throttle but there is no response in q_stabilize mode. From the logfile throttle graph, it seems like the pixhawk is not responding to the transmitter once the mode is changed.