A350XWB-keyboard.xml

<?xml version="1.0"?>
<PropertyList>
  <key n="123">
  <name>{</name>
  <desc>Turn cutoffs off</desc>
  <binding>
   <command>property-assign</command>
   <property>/controls/engines/engine[0]/cutoff</property>
   <value>1</value>
  </binding> 
  <binding>
   <command>property-assign</command>
   <property>/controls/engines/engine[1]/cutoff</property>
   <value>1</value>
 </binding>
 </key>
  <key n="125">
  <name>}</name>
  <desc>Turn cutoffs on</desc>
  <binding>
   <command>property-assign</command>
   <property>/controls/engines/engine[0]/cutoff</property>
   <value>0</value>
  </binding> 
  <binding>
   <command>property-assign</command>
   <property>/controls/engines/engine[1]/cutoff</property>
   <value>0</value>
 </binding>
 </key>
</PropertyList>