diff --git a/Models/Instruments/MCDU1/MCDU1.xml b/Models/Instruments/MCDU1/MCDU1.xml
index 02c9adc1..848fab66 100644
--- a/Models/Instruments/MCDU1/MCDU1.xml
+++ b/Models/Instruments/MCDU1/MCDU1.xml
@@ -202,6 +202,28 @@
 		</condition>
 	</model>
 	
+	<model>
+		<name>DES</name>
+		<path>PERF/DES/DES.xml</path>
+		<offsets>
+			<heading-deg>180</heading-deg>
+			<roll-deg>180</roll-deg>
+			<pitch-deg>90</pitch-deg>
+		</offsets>
+		<condition>
+			<and>
+				<greater-than-equals>
+					<property>/systems/electrical/bus/ac1</property>
+					<value>110</value>
+				</greater-than-equals>
+				<equals>
+					<property>/MCDU[0]/page</property>
+					<value>DES</value>
+				</equals>
+			</and>
+		</condition>
+	</model>
+	
 	<model>
 		<name>DATA2</name>
 		<path>DATA2/DATA2.xml</path>
diff --git a/Models/Instruments/MCDU2/MCDU2.xml b/Models/Instruments/MCDU2/MCDU2.xml
index 29c9968f..0bc0cdef 100644
--- a/Models/Instruments/MCDU2/MCDU2.xml
+++ b/Models/Instruments/MCDU2/MCDU2.xml
@@ -202,6 +202,28 @@
 		</condition>
 	</model>
 	
+	<model>
+		<name>DES</name>
+		<path>PERF/DES/DES.xml</path>
+		<offsets>
+			<heading-deg>180</heading-deg>
+			<roll-deg>180</roll-deg>
+			<pitch-deg>90</pitch-deg>
+		</offsets>
+		<condition>
+			<and>
+				<greater-than-equals>
+					<property>/systems/electrical/bus/ac2</property>
+					<value>110</value>
+				</greater-than-equals>
+				<equals>
+					<property>/MCDU[1]/page</property>
+					<value>DES</value>
+				</equals>
+			</and>
+		</condition>
+	</model>
+	
 	<model>
 		<name>DATA2</name>
 		<path>DATA2/DATA2.xml</path>
diff --git a/Nasal/MCDU/MCDU1.nas b/Nasal/MCDU/MCDU1.nas
index a390fee1..5ab3650f 100644
--- a/Nasal/MCDU/MCDU1.nas
+++ b/Nasal/MCDU/MCDU1.nas
@@ -69,6 +69,10 @@ var lskbutton = func(btn) {
 			radnavInput("L2");
 		} else if (getprop("/MCDU[0]/page") == "CLB") {
 			initInputA("L5"); # Does the same thing as on the INIT page
+		} else if (getprop("/MCDU[0]/page") == "CRZ") {
+			initInputA("L5"); 
+		} else if (getprop("/MCDU[0]/page") == "DES") {
+			initInputA("L5"); 
 		} else {
 			setprop("/MCDU[0]/scratchpad-msg", "1");
 			setprop("/MCDU[0]/scratchpad", "NOT ALLOWED");
@@ -102,6 +106,10 @@ var lskbutton = func(btn) {
 			perfTOInput("L5");
 		} else if (getprop("/MCDU[0]/page") == "CLB") {
 			perfCLBInput("L5");
+		} else if (getprop("/MCDU[0]/page") == "CRZ") {
+			perfCRZInput("L5");
+		} else if (getprop("/MCDU[0]/page") == "DES") {
+			perfDESInput("L5");
 		} else {
 			setprop("/MCDU[0]/scratchpad-msg", "1");
 			setprop("/MCDU[0]/scratchpad", "NOT ALLOWED");
@@ -113,6 +121,8 @@ var lskbutton = func(btn) {
 			perfCLBInput("L6");
 		} else if (getprop("/MCDU[0]/page") == "CRZ") {
 			perfCRZInput("L6");
+		} else if (getprop("/MCDU[0]/page") == "DES") {
+			perfDESInput("L6");
 		} else {
 			setprop("/MCDU[0]/scratchpad-msg", "1");
 			setprop("/MCDU[0]/scratchpad", "NOT ALLOWED");
@@ -173,6 +183,8 @@ var rskbutton = func(btn) {
 			perfTOInput("R6");
 		} else if (getprop("/MCDU[0]/page") == "CLB") {
 			perfCLBInput("R6");
+		} else if (getprop("/MCDU[0]/page") == "CRZ") {
+			perfCRZInput("R6");
 		} else {
 			setprop("/MCDU[0]/scratchpad-msg", "1");
 			setprop("/MCDU[0]/scratchpad", "NOT ALLOWED");
@@ -688,9 +700,15 @@ var perfCRZInput = func(key) {
 	if (key == "L6") {
 		setprop("/MCDU[0]/page", "CLB");
 	}
-	# if (key == "R6") {
-	 #	setprop("/MCDU[0]/page", "DES");
-	# }
+	if (key == "R6") {
+		setprop("/MCDU[0]/page", "DES");
+	}
+}
+
+var perfDESInput = func(key) {
+	if (key == "L6") {
+		setprop("/MCDU[0]/page", "CRZ");
+	}
 }
 
 var arrowbutton = func(btn) {
diff --git a/Nasal/MCDU/MCDU2.nas b/Nasal/MCDU/MCDU2.nas
index 907476bd..7d086ead 100644
--- a/Nasal/MCDU/MCDU2.nas
+++ b/Nasal/MCDU/MCDU2.nas
@@ -69,6 +69,10 @@ var lskbutton = func(btn) {
 			radnavInput("L2");
 		} else if (getprop("/MCDU[1]/page") == "CLB") {
 			initInputA("L5"); # Does the same thing as on the INIT page
+		} else if (getprop("/MCDU[0]/page") == "CRZ") {
+			initInputA("L5"); 
+		} else if (getprop("/MCDU[0]/page") == "DES") {
+			initInputA("L5"); 
 		} else {
 			setprop("/MCDU[1]/scratchpad-msg", "1");
 			setprop("/MCDU[1]/scratchpad", "NOT ALLOWED");
@@ -102,6 +106,10 @@ var lskbutton = func(btn) {
 			perfTOInput("L5");
 		} else if (getprop("/MCDU[1]/page") == "CLB") {
 			perfCLBInput("L5");
+		} else if (getprop("/MCDU[1]/page") == "CRZ") {
+			perfCRZInput("L5");
+		} else if (getprop("/MCDU[1]/page") == "DES") {
+			perfDESInput("L5");
 		} else {
 			setprop("/MCDU[1]/scratchpad-msg", "1");
 			setprop("/MCDU[1]/scratchpad", "NOT ALLOWED");
@@ -113,6 +121,8 @@ var lskbutton = func(btn) {
 			perfCLBInput("L6");
 		} else if (getprop("/MCDU[1]/page") == "CRZ") {
 			perfCRZInput("L6");
+		} else if (getprop("/MCDU[0]/page") == "DES") {
+			perfDESInput("L6");
 		} else {
 			setprop("/MCDU[1]/scratchpad-msg", "1");
 			setprop("/MCDU[1]/scratchpad", "NOT ALLOWED");
@@ -173,6 +183,8 @@ var rskbutton = func(btn) {
 			perfTOInput("R6");
 		} else if (getprop("/MCDU[1]/page") == "CLB") {
 			perfCLBInput("R6");
+		} else if (getprop("/MCDU[1]/page") == "CRZ") {
+			perfCRZInput("R6");
 		} else {
 			setprop("/MCDU[1]/scratchpad-msg", "1");
 			setprop("/MCDU[1]/scratchpad", "NOT ALLOWED");
@@ -688,9 +700,15 @@ var perfCRZInput = func(key) {
 	if (key == "L6") {
 		setprop("/MCDU[1]/page", "CLB");
 	}
-	# if (key == "R6") {
-	 #	setprop("/MCDU[1]/page", "DES");
-	# }
+	if (key == "R6") {
+		setprop("/MCDU[1]/page", "DES");
+	}
+}
+
+var perfDESInput = func(key) {
+	if (key == "L6") {
+		setprop("/MCDU[1]/page", "CRZ");
+	}
 }
 
 var arrowbutton = func(btn) {
diff --git a/Nasal/fadec.nas b/Nasal/fadec.nas
index e8e56019..78b5af7f 100644
--- a/Nasal/fadec.nas
+++ b/Nasal/fadec.nas
@@ -23,6 +23,7 @@ setlistener("/sim/signals/fdm-initialized", func {
 	setprop("/systems/thrust/mct-lim", 0.0);
 	setprop("/systems/thrust/clb-lim", 0.0);
 	setprop("/systems/thrust/lim-flex", 0);
+	setprop("/engines/flex-derate", 0);
 	thrustt.start();
 });
 
diff --git a/Nasal/pneumatics.nas b/Nasal/pneumatics.nas
index 9374f4b0..6e77c312 100644
--- a/Nasal/pneumatics.nas
+++ b/Nasal/pneumatics.nas
@@ -51,6 +51,8 @@ var pneu_init = func {
 	setprop("/systems/ventilation/avionics/inletvalve", "0");
 	setprop("/systems/ventilation/lavatory/extractfan", 0);
 	setprop("/systems/ventilation/lavatory/extractvalve", "0");
+	setprop("/systems/pressurization/ambientpsi", "0");
+	setprop("/systems/pressurization/cabinpsi", "0");
 	pneu_timer.start();
 }