diff --git a/Systems/a318-aerodynamics.xml b/Systems/a318-aerodynamics.xml
index 1ab522e4..6e801d21 100644
--- a/Systems/a318-aerodynamics.xml
+++ b/Systems/a318-aerodynamics.xml
@@ -156,7 +156,7 @@
 			<product>
 				<property>aero/qbar-psf</property>
 				<property>metrics/Sw-sqft</property>
-				<property>fcs/flap-pos-deg</property>
+				<property>fcs/slat-pos-deg</property>
 				<value> 0.00080 </value>
 			</product>
 		</function>
diff --git a/Systems/a319-aerodynamics.xml b/Systems/a319-aerodynamics.xml
index 1ab522e4..6e801d21 100644
--- a/Systems/a319-aerodynamics.xml
+++ b/Systems/a319-aerodynamics.xml
@@ -156,7 +156,7 @@
 			<product>
 				<property>aero/qbar-psf</property>
 				<property>metrics/Sw-sqft</property>
-				<property>fcs/flap-pos-deg</property>
+				<property>fcs/slat-pos-deg</property>
 				<value> 0.00080 </value>
 			</product>
 		</function>
diff --git a/Systems/a320-aerodynamics.xml b/Systems/a320-aerodynamics.xml
index 1ab522e4..6e801d21 100644
--- a/Systems/a320-aerodynamics.xml
+++ b/Systems/a320-aerodynamics.xml
@@ -156,7 +156,7 @@
 			<product>
 				<property>aero/qbar-psf</property>
 				<property>metrics/Sw-sqft</property>
-				<property>fcs/flap-pos-deg</property>
+				<property>fcs/slat-pos-deg</property>
 				<value> 0.00080 </value>
 			</product>
 		</function>
diff --git a/Systems/a321-aerodynamics.xml b/Systems/a321-aerodynamics.xml
index 1ab522e4..6e801d21 100644
--- a/Systems/a321-aerodynamics.xml
+++ b/Systems/a321-aerodynamics.xml
@@ -156,7 +156,7 @@
 			<product>
 				<property>aero/qbar-psf</property>
 				<property>metrics/Sw-sqft</property>
-				<property>fcs/flap-pos-deg</property>
+				<property>fcs/slat-pos-deg</property>
 				<value> 0.00080 </value>
 			</product>
 		</function>
diff --git a/revision.txt b/revision.txt
index a2cb5787..37b24e26 100644
--- a/revision.txt
+++ b/revision.txt
@@ -1 +1 @@
-2170
\ No newline at end of file
+2173
\ No newline at end of file