diff --git a/Nasal/Systems/hydraulics.nas b/Nasal/Systems/hydraulics.nas
index 9ae7e607..ca06c7a3 100644
--- a/Nasal/Systems/hydraulics.nas
+++ b/Nasal/Systems/hydraulics.nas
@@ -37,7 +37,7 @@ var HYD = {
 		yellow: props.globals.getNode("systems/hydraulic/yellow-psi"),
 	},
 	Ptu: {
-		active: props.globals.getNode("systems/hydraulic/sources/ptu/ptu-active"),
+		active: props.globals.getNode("systems/hydraulic/sources/ptu/ptu-hydraulic-condition"),
 		diff: props.globals.getNode("systems/hydraulic/yellow-psi-diff"),
 	},
 	Qty: {
diff --git a/Sounds/A320-common-sound.xml b/Sounds/A320-common-sound.xml
index 828bbfbc..0bf16ec7 100644
--- a/Sounds/A320-common-sound.xml
+++ b/Sounds/A320-common-sound.xml
@@ -57,11 +57,10 @@
 			</condition>
 		</hyd-yellow>
 		
-		<!-- Disabled until proper PTU system implemented, to not annoy people -->
 		<hyd>
 			<name>PTU</name>
 			<mode>once</mode>
-			<path>airbus_ptu.wav</path>
+			<path>airbus_ptu_on.wav</path>
 			<condition>
 				<or>
 					<property>/systems/hydraulic/sources/ptu/yellow-green</property>
@@ -75,6 +74,23 @@
 			<max-dist>100.0</max-dist>
 		</hyd>
 		
+		<hyd>
+			<name>PTU-loop</name>
+			<mode>looped</mode>
+			<path>airbus_ptu.wav</path>
+			<condition>
+				<equals>
+					<property>/systems/hydraulic/sources/ptu/ptu-loop-sound</property>
+					<value>1</value>
+				</equals>
+			</condition>
+			<volume>
+				<factor>8</factor>
+			</volume>
+			<reference-dist>20.0</reference-dist>
+			<max-dist>100.0</max-dist>
+		</hyd>
+		
 		<announcement>
 			<name>PurserSnacks</name>
 			<mode>once</mode>
diff --git a/Sounds/airbus_ptu.wav b/Sounds/airbus_ptu.wav
index f3f0283c..ba50cf22 100644
Binary files a/Sounds/airbus_ptu.wav and b/Sounds/airbus_ptu.wav differ
diff --git a/Sounds/airbus_ptu_on.wav b/Sounds/airbus_ptu_on.wav
new file mode 100644
index 00000000..4a6f7f7f
Binary files /dev/null and b/Sounds/airbus_ptu_on.wav differ
diff --git a/Systems/a320-hydraulic.xml b/Systems/a320-hydraulic.xml
index fc1ce302..e4b44abc 100644
--- a/Systems/a320-hydraulic.xml
+++ b/Systems/a320-hydraulic.xml
@@ -416,25 +416,44 @@
 			</function>
 		</fcs_function>
 		
-		<switch name="/systems/hydraulic/sources/ptu/ptu-active">
+		<switch name="/systems/hydraulic/sources/ptu/ptu-inhibited">
+			<default value="1"/>
+			<test logic="OR" value="0">
+				<test logic="AND">
+					/sim/model/autopush/enabled eq 0
+					/controls/gear/brake-parking eq 0
+				</test>
+				<test logic="AND">
+					/controls/engines/engine[0]/cutoff-switch eq 0
+					/controls/engines/engine[1]/cutoff-switch eq 0
+				</test>
+				<test logic="AND">
+					/controls/engines/engine[0]/cutoff-switch eq 1
+					/controls/engines/engine[1]/cutoff-switch eq 1
+				</test>
+				/gear/gear[0]/compression-norm eq 0
+			</test>
+		</switch>
+		
+		<switch name="/systems/hydraulic/sources/ptu/ptu-hydraulic-condition">
 			<test logic="AND" value="0">
 				/systems/hydraulic/yellow-psi-diff gt -250
 				/systems/hydraulic/yellow-psi-diff lt 250
-				/systems/hydraulic/sources/ptu/ptu-active eq 1
+				/systems/hydraulic/sources/ptu/ptu-hydraulic-condition eq 1
 			</test>
 			<test logic="AND" value="1">
 				<test logic="OR">
 					/systems/hydraulic/yellow-psi-diff ge 250
 					/systems/hydraulic/yellow-psi-diff le -250
 				</test>
-				/systems/hydraulic/sources/ptu/ptu-active eq 1
+				/systems/hydraulic/sources/ptu/ptu-hydraulic-condition eq 1
 			</test>
 			<test logic="AND" value="1">
 				<test logic="OR">
 					/systems/hydraulic/yellow-psi-diff gt 500
 					/systems/hydraulic/yellow-psi-diff lt -500
 				</test>
-				/systems/hydraulic/sources/ptu/ptu-active eq 0
+				/systems/hydraulic/sources/ptu/ptu-hydraulic-condition eq 0
 			</test>
 		</switch>
 		
@@ -442,18 +461,34 @@
 			<default value="0"/>
 			<test logic="AND" value="/systems/hydraulic/green-psi-ptu">
 				/controls/hydraulic/switches/ptu eq 1
-				/systems/hydraulic/sources/ptu/ptu-active eq 1
+				/systems/hydraulic/sources/ptu/ptu-hydraulic-condition eq 1
+				/systems/hydraulic/sources/ptu/ptu-inhibited eq 0
 				/systems/electrical/bus/dc-2 ge 25
 				/systems/failures/hydraulic/ptu ne 1
 				/systems/hydraulic/sources/yellow-edp/fire-valve lt 0.10
 			</test>
 		</switch>
 		
+		<switch name="/systems/hydraulic/sources/ptu/ptu-loop-sound-cmd">
+			<default value="0"/>
+			<test logic="OR" value="1">
+				/systems/hydraulic/sources/ptu/yellow-green ne 0
+				/systems/hydraulic/sources/ptu/green-yellow ne 0
+			</test>
+		</switch>
+		
+		<actuator name="/systems/hydraulic/sources/ptu/ptu-loop-sound">
+			<input>/systems/hydraulic/sources/ptu/ptu-loop-sound-cmd</input>
+			<rate_limit sense="incr">1</rate_limit>
+			<rate_limit sense="decr">100</rate_limit> <!-- instant -->
+		</actuator>
+		
 		<switch name="/systems/hydraulic/sources/ptu/yellow-green">
 			<default value="0"/>
 			<test logic="AND" value="/systems/hydraulic/yellow-psi-ptu">
 				/controls/hydraulic/switches/ptu eq 1
-				/systems/hydraulic/sources/ptu/ptu-active eq 1
+				/systems/hydraulic/sources/ptu/ptu-hydraulic-condition eq 1
+				/systems/hydraulic/sources/ptu/ptu-inhibited eq 0
 				/systems/electrical/bus/dc-2 ge 25
 				/systems/failures/hydraulic/ptu ne 1
 				/systems/hydraulic/sources/green-edp/fire-valve lt 0.10