Look out for Ice Ridges on the Lower Nose Fuselage
With the start of the winter season in the northern hemisphere, it is a timely reminder to re-publish this article, initially published in 2018. Ice ridges on the lower nose fuselage can cause Computed Airspeed (CAS) values delivered by the ADRs to be lower than the actual airspeed which may lead to unreliable airspeed events. This article describes the potential effect on the aircraft’s systems from the takeoff phase and how to prevent such situation.
Preparing for a Safe Return to the Skies
Aircraft that were parked or stored due to the impacts of the COVID-19 sanitary crisis are progressively returning to the skies. It is in this context that Airbus has already received several reports of rejected takeoff (RTO) and in-flight turn back (IFTB) events due to unreliable airspeed. All of these events had positive outcomes thanks to the actions of the flight crews. It does however illustrate the challenges for returning aircraft to flying, after they are parked or stored, and if the maintenance procedures are not followed in all cases. This is why we take this opportunity to share all of the available Airbus information and industry guidelines that can support Operators to ensure their safe return to the skies.
The Adverse Effects of Unrealistic Simulator Scenarios
The use of unrealistic failure scenarios during simulator training can lead to negative training. This article describes the « TOTAL PITOT BLOCKED » failure that is available in simulators. It explains why simultaneous and permanent dual “TOTAL PITOT BLOCKED” in climb or descent phase leads to negative training.
Pitot Probe Performance Covered On the Ground
Pitot probes inlet obstruction will affect accuracy of the air data parameters calculated from its measurements such as the aircraft airspeed and Mach number. Pitot probes inlet obstruction on the ground can be caused by unexpected sources such as sand, dirt, dust or insect nesting activity. This is why it is important to think about when to install Pitot probe covers for an aircraft on the ground to protect its air data system performance.