diff --git a/Models/Instruments/OHpanel/OHpanel.xml b/Models/Instruments/OHpanel/OHpanel.xml
index a126d294..9d76c1f1 100644
--- a/Models/Instruments/OHpanel/OHpanel.xml
+++ b/Models/Instruments/OHpanel/OHpanel.xml
@@ -71,6 +71,7 @@
 		<object-name>RamAirBtn2O</object-name>
 		<object-name>SEC1Btn1F</object-name>
 		<object-name>SEC1Btn2O</object-name>
+		<object-name>VentBlowBtn1F</object-name>
 		<condition>
 			<or>
 				<greater-than-equals>
@@ -167,8 +168,6 @@
 		<object-name>SEC2Btn2O</object-name>
 		<object-name>SEC3Btn1F</object-name>
 		<object-name>SEC3Btn2O</object-name>
-		<object-name>VentBlowBtn1F</object-name>
-		<object-name>VentBlowBtn2O</object-name>
 		<object-name>VentExtractBtn1F</object-name>
 		<object-name>VentExtractBtn2O</object-name>
 		<object-name>WingAntiIceBtn1F</object-name>
@@ -210,7 +209,6 @@
 		<object-name>Gen1LineBtn1S</object-name>
 		<object-name>Gen1LineBtn2O</object-name>
 		<object-name>RcdrGndCtlBtn2O</object-name>
-		<object-name>VentBlowBtn1F</object-name>
 		<object-name>VentBlowBtn2O</object-name>
 		<object-name>VentExtractBtn1F</object-name>
 		<object-name>VentExtractBtn2O</object-name>
@@ -238,6 +236,24 @@
 		</diffuse>
 	</animation>
 	
+	<!-- Ventilation -->
+	<animation>
+		<type>select</type>
+		<object-name>VentBlowBtn1F</object-name>
+		<condition>
+			<or>
+				<equals>
+					<property>/controls/ventilation/blowFail</property>
+					<value>1</value>
+				</equals>
+				<equals>
+					<property>controls/switches/annun-test</property>
+					<value>1</value>
+				</equals>
+			</or>
+		</condition>
+	</animation>
+	
 	<!-- Cargo Smoke -->
 	<animation>
 		<type>select</type>
@@ -1132,7 +1148,7 @@
 			<or>
 				<and>
 					<equals>
-						<property>systems/failures/fac1</property>
+						<property>systems/failures/fac1-fault</property>
 						<value>1</value>
 					</equals>
 					<equals>
@@ -1400,7 +1416,7 @@
 			<or>
 				<and>
 					<equals>
-						<property>systems/failures/fac2</property>
+						<property>systems/failures/fac2-fault</property>
 						<value>1</value>
 					</equals>
 					<equals>
@@ -2720,7 +2736,7 @@
 			</binding>
 			<binding>
 				<command>nasal</command>
-				<script>systems.batflash();</script>
+				<script>systems.fctlpoweruptest();</script>
 			</binding>
 		</action>
 	</animation>
@@ -2785,7 +2801,7 @@
 			</binding>
 			<binding>
 				<command>nasal</command>
-				<script>systems.batflash();</script>
+				<script>systems.fctlpoweruptest();</script>
 			</binding>
 		</action>
 	</animation>
diff --git a/Nasal/electrical.nas b/Nasal/electrical.nas
index 7824001e..be8063ba 100644
--- a/Nasal/electrical.nas
+++ b/Nasal/electrical.nas
@@ -43,6 +43,7 @@ setlistener("/sim/signals/fdm-initialized", func {
 	var ac1 = getprop("/systems/electrical/bus/ac1");
 	var ac2 = getprop("/systems/electrical/bus/ac2");
 	var ac_ess = getprop("/systems/electrical/bus/ac-ess");
+	var dc_ess_shed = getprop("/systems/electrical/bus/dc-ess-shed");
 	var ac_ess_shed = getprop("/systems/electrical/bus/ac-ess-shed");
 	var dc1 = getprop("/systems/electrical/bus/dc1");
 	var dc2 = getprop("/systems/electrical/bus/dc2");
@@ -163,6 +164,7 @@ var ELEC = {
 		setprop("/systems/electrical/bus/gen1-hz", 0);
 		setprop("/systems/electrical/bus/gen2-hz", 0);
 		setprop("/systems/electrical/bus/ac-ess", 0);
+		setprop("/systems/electrical/bus/dc-ess-shed", 0);
 		setprop("/systems/electrical/bus/ac-ess-shed", 0);
 		setprop("/systems/electrical/extra/ext-volts", 0);
 		setprop("/systems/electrical/extra/apu-volts", 0);
@@ -269,6 +271,7 @@ var ELEC = {
 		ac1 = getprop("/systems/electrical/bus/ac1");
 		ac2 = getprop("/systems/electrical/bus/ac2");
 		ac_ess = getprop("/systems/electrical/bus/ac-ess");
+		dc_ess_shed = getprop("/systems/electrical/bus/dc-ess-shed");
 		ac_ess_shed = getprop("/systems/electrical/bus/ac-ess-shed");
 		dc1 = getprop("/systems/electrical/bus/dc1");
 		dc2 = getprop("/systems/electrical/bus/dc2");
@@ -531,6 +534,12 @@ var ELEC = {
 			setprop("/controls/electrical/switches/emer-gen", 0);
 		}
 		
+		if (emergen == 0 and ac1 == 0 and ac2 == 0) { # as far as I know dc ess is only shed when batteries only
+			setprop("/systems/electrical/bus/dc-ess-shed", 0);
+		} else {
+			setprop("/systems/electrical/bus/dc-ess-shed", ac_volt_std);
+		}
+		
 		dc1 = getprop("/systems/electrical/bus/dc1");
 		dc2 = getprop("/systems/electrical/bus/dc2");
 		
@@ -688,6 +697,14 @@ var ELEC = {
 			setprop("/systems/electrical/gen2-fault", 0);
 		}
 		
+		# these two are here because they are on whenever the battery switch is on with no ac source connected (youtube)
+		
+		if ((battery1_sw or battery2_sw) and dc1 < 25 and ac1 < 110) {
+			setprop("/controls/ventilation/blowFail", 1);
+		} else {
+			setprop("/controls/ventilation/blowFail", 0);
+		}
+		
 		foreach(var screena; screens) { 
 			power_consumption = screena.power_consumption();
 			if (getprop(screena.elec_prop) != 0) {
@@ -725,19 +742,17 @@ var decharge2 = maketimer(69, func {
 	setprop("/systems/electrical/battery2-volts", bat2_volts - 0.1);
 });
 
-var batflash = func {
+var fctlpoweruptest = func {
 	if (getprop("/systems/electrical/battery-available") == 0) {
 		setprop("/systems/failures/elac1", 1);
 		setprop("/systems/failures/sec1", 1);
-		setprop("/systems/failures/fac1", 1);
 		setprop("/systems/electrical/battery-available", 1);
 		settimer(func(){
 			setprop("/systems/failures/elac1", 0);
-		},1.5);
+		},8);
 		settimer(func(){
 			setprop("/systems/failures/sec1", 0);
-			setprop("/systems/failures/fac1", 0);
-		},2);
+		},8.5);
 	}
 }
 
diff --git a/Nasal/it-fbw.nas b/Nasal/it-fbw.nas
index c0fab015..2007a1f8 100644
--- a/Nasal/it-fbw.nas
+++ b/Nasal/it-fbw.nas
@@ -39,20 +39,28 @@ var fctlInit = func {
 var update_loop = func {
 	var elac1_sw = getprop("/controls/fctl/elac1");
 	var elac2_sw = getprop("/controls/fctl/elac2");
-	var sec1_sw = getprop("/controls/fctl/sec1");
-	var sec2_sw = getprop("/controls/fctl/sec2");
-	var sec3_sw = getprop("/controls/fctl/sec3");
-	var fac1_sw = getprop("/controls/fctl/fac1");
-	var fac2_sw = getprop("/controls/fctl/fac2");
+	var sec1_sw  = getprop("/controls/fctl/sec1");
+	var sec2_sw  = getprop("/controls/fctl/sec2");
+	var sec3_sw  = getprop("/controls/fctl/sec3");
+	var fac1_sw  = getprop("/controls/fctl/fac1");
+	var fac2_sw  = getprop("/controls/fctl/fac2");
 	
-	var elac1_fail = getprop("/systems/failures/elac1");
-	var elac2_fail = getprop("/systems/failures/elac2");
-	var sec1_fail = getprop("/systems/failures/sec1");
-	var sec2_fail = getprop("/systems/failures/sec2");
-	var sec3_fail = getprop("/systems/failures/sec3");
-	var fac1_fail = getprop("/systems/failures/fac1");
-	var fac2_fail = getprop("/systems/failures/fac2");
-	var ac_ess = getprop("/systems/electrical/bus/ac-ess");
+	var elac1_fail  = getprop("/systems/failures/elac1");
+	var elac2_fail  = getprop("/systems/failures/elac2");
+	var sec1_fail   = getprop("/systems/failures/sec1");
+	var sec2_fail   = getprop("/systems/failures/sec2");
+	var sec3_fail   = getprop("/systems/failures/sec3");
+	var fac1_fail   = getprop("/systems/failures/fac1");
+	var fac2_fail   = getprop("/systems/failures/fac2");
+	
+	var ac_ess      = getprop("/systems/electrical/bus/ac-ess");
+	var dc_ess_shed = getprop("/systems/electrical/bus/dc-ess-shed");
+	var ac1         = getprop("/systems/electrical/bus/ac1");
+	var ac2         = getprop("/systems/electrical/bus/ac2");
+	var dc1         = getprop("/systems/electrical/bus/dc1");
+	var dc2         = getprop("/systems/electrical/bus/dc2");
+	var battery1_sw = getprop("/controls/electrical/switches/battery1");
+	var battery2_sw = getprop("/controls/electrical/switches/battery2");
 	
 	if (elac1_sw and !elac1_fail and ac_ess >= 110) {
 		setprop("/systems/fctl/elac1", 1);
@@ -104,20 +112,36 @@ var update_loop = func {
 		setprop("/systems/failures/spoiler-r2", 1);
 	}
 	
-	if (fac1_sw and !fac1_fail and ac_ess >= 110) {
+	if (fac1_sw and !fac1_fail and (ac_ess >= 110 or dc_ess_shed >= 25)) {
 		setprop("/systems/fctl/fac1", 1);
 		setprop("/systems/failures/rudder", 0);
+		setprop("/systems/failures/fac1-fault", 0);
+	} else if (fac1_sw and (battery1_sw or battery2_sw) and (fac1_fail or ac_ess < 110 or dc_ess_shed < 25)) {
+		setprop("/systems/failures/fac1-fault", 1);
+		setprop("/systems/fctl/fac1", 0);
+		if (!fac2_sw or fac2_fail) {
+			setprop("/systems/failures/rudder", 1);
+		}
 	} else {
+		setprop("/systems/failures/fac1-fault", 0);
 		setprop("/systems/fctl/fac1", 0);
 		if (!fac2_sw or fac2_fail) {
 			setprop("/systems/failures/rudder", 1);
 		}
 	}
 	
-	if (fac2_sw and !fac2_fail and ac_ess >= 110) {
+	if (fac2_sw and !fac2_fail and (ac2 >= 110 or dc2 >= 25)) {
 		setprop("/systems/fctl/fac2", 1);
+		setprop("/systems/failures/fac2-fault", 0);
+	} else if (fac2_sw and (fac2_fail or ac2 < 110 or dc2 < 25)) {
+		setprop("/systems/failures/fac2-fault", 1);
+		setprop("/systems/fctl/fac2", 0);
+		if (!fac1_sw or fac1_fail) {
+			setprop("/systems/failures/rudder", 1);
+		}
 	} else {
 		setprop("/systems/fctl/fac2", 0);
+		setprop("/systems/failures/fac2-fault", 0);
 		if (!fac1_sw or fac1_fail) {
 			setprop("/systems/failures/rudder", 1);
 		}