![File:Airbus A350-900 XWB Airbus Industries (AIB) MSN 001 - F-WXWB (10223079236).jpg - Wikimedia Commons File:Airbus A350-900 XWB Airbus Industries (AIB) MSN 001 - F-WXWB (10223079236).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/5/5e/Airbus_A350-900_XWB_Airbus_Industries_%28AIB%29_MSN_001_-_F-WXWB_%2810223079236%29.jpg)
File:Airbus A350-900 XWB Airbus Industries (AIB) MSN 001 - F-WXWB (10223079236).jpg - Wikimedia Commons
![A350Blog on Twitter: "What is that in the belly fairing of #A350? The ram air turbine (RAT)deployed during landing https://t.co/GHSyiCbNbw https://t.co/guagTXfE5T" / Twitter A350Blog on Twitter: "What is that in the belly fairing of #A350? The ram air turbine (RAT)deployed during landing https://t.co/GHSyiCbNbw https://t.co/guagTXfE5T" / Twitter](https://pbs.twimg.com/media/CeWmJtdWQAAiIHv.jpg)
A350Blog on Twitter: "What is that in the belly fairing of #A350? The ram air turbine (RAT)deployed during landing https://t.co/GHSyiCbNbw https://t.co/guagTXfE5T" / Twitter
Aviation Toulouse on Twitter: "Did you know that during each first flight the RAT (Ram Air Turbine or emergency power system) is tested ? RAT of #A350 msn 62 of yesterday. https://t.co/TQ7NfiTnWc" /
![A350 XWB News: One of the first test already done in the A350 MSN1 test-flights has been the RAT emergency power system. A350 XWB News: One of the first test already done in the A350 MSN1 test-flights has been the RAT emergency power system.](http://3.bp.blogspot.com/-gicA1uuLOP8/UeR7YhTzZLI/AAAAAAAAF7w/k6_fBYUGQj0/s1600/A350+RAT+deployed.jpg)