New Avionics Equipment Ventilation System (AEVS) on Airbus Aircraft
A320 CEO/NEO Avionics Equipment Ventilation System New (AEVS) flight mode logic enhancement
The triggering of this E/W « VENT SKIN VALVE FAULT » can lead to Rejected Take-Off (RTO) or In-Flight Turn Back (IFTB), especially at the time of Take-Off or when the valve indication is lost
With skin air outlet valve stucked in open positon it is not possible to pressurize the cabin as intended
Airbus reviewed the feasibility of improving the control logic to close the Skin Air valve earlier therefore detect non-closure before Take-Off in order to prevent In Flight Turn Back, Diversion or Rejected Take-Off in case of valve failure at Take-Off
Today, with the current logic, the AEVS is commanded to closed loop configuration according to Throttle Lever Angle (TLA) input from the Engine Interface Unit (EIU) to the AEVC at the beginning of the Take-Off roll (or if the ambient temperature condition allows the closed loop ventilation mode during GND operation phase)
the improvement is to use the TO CONFIG P/B input in addition to the TLA the AEVS will be commanded to closed loop configuration, toward the end of the Taxi-Out, just before Take-Off (earlier than current configuration), thus allowing good time for the skin valves to close and notify the flight crew about valve malfunction before the Take-Off roll is commenced. the TO CONFIG P/B takes effect on the system configuration
The AEVS logic enhancement will be activated only after embodiment of FWC version H2-F13C, wiring adaptation and SDAC pin programming
Post a Comment
Spam Not Allowed. We accepting Guest Posts. Any Doubts write us mail@kasworld-aero.ml