Original sentence: The advice issued by Airbus, although not unusual for a manufacturer following an accident, has led to suggestions that the aircraft experienced a high-altitude aerodynamic stall, as a result of flying at the incorrect airspeed
Edited sentence: The very fact that Airbus is issuing this new advice gives some credence to the claim that the pilots miscalculated the required speed to continue flying through the storm, causing a high-altitude aerodynamic stall