diff --git a/Models/Instruments/Lower-ECAM/Lower-ECAM.nas b/Models/Instruments/Lower-ECAM/Lower-ECAM.nas
index bd4ec3f7..5a704395 100644
--- a/Models/Instruments/Lower-ECAM/Lower-ECAM.nas
+++ b/Models/Instruments/Lower-ECAM/Lower-ECAM.nas
@@ -203,6 +203,7 @@ var canvas_lowerECAM_base = {
 	getKeys: func() {
 		return [];
 	},
+	du4OffTimer: 0,
 	updateDu4: func() {
 		var elapsedtime = pts.Sim.Time.elapsedSec.getValue();
 		
@@ -224,9 +225,12 @@ var canvas_lowerECAM_base = {
 					du4_test_time.setValue(-100);
 				}
 			}
-		} else {
+			me.du4OffTimer = 0;
+			du4_offtime.setValue(0);
+		} elsif (me.du4OffTimer == 0) {
 			du4_test.setValue(0);
-			du4_offtime.setValue(elapsedtime);
+			me.du4OffTimer = 1;
+			du4_offtime.setValue(elapsedtime_act);
 		}
 	},
 	update: func() {
diff --git a/Models/Instruments/ND/canvas/ND.nas b/Models/Instruments/ND/canvas/ND.nas
index 5fe845d3..8f4edd91 100644
--- a/Models/Instruments/ND/canvas/ND.nas
+++ b/Models/Instruments/ND/canvas/ND.nas
@@ -87,6 +87,7 @@ var canvas_nd_base = {
 	getKeys: func() {
 		return [];
 	},
+	du2OffTimer: 0,
 	updateDu2: func() {
 		var elapsedtime = getprop("sim/time/elapsed-sec");
 		if (getprop("systems/electrical/bus/ac-ess-shed") >= 110) {
@@ -107,11 +108,15 @@ var canvas_nd_base = {
 					du2_test_time.setValue(-100);
 				}
 			}
-		} else {
+			me.du2OffTimer = 0;
+			du2_offtime.setValue(0);
+		} elsif (me.du2OffTimer == 0) {
 			du2_test.setValue(0);
-			du2_offtime.setValue(elapsedtime);
+			me.du2OffTimer = 1;
+			du2_offtime.setValue(elapsedtime_act);
 		}
 	},
+	du5OffTimer: 0,
 	updateDu5: func() {
 		var elapsedtime = getprop("sim/time/elapsed-sec");
 		if (getprop("systems/electrical/bus/ac-2") >= 110) {
@@ -132,11 +137,13 @@ var canvas_nd_base = {
 					du5_test_time.setValue(-100);
 				}
 			}
-		} else {
+			me.du5OffTimer = 0;
+			du5_offtime.setValue(0);
+		} elsif (me.du5OffTimer == 0) {
 			du5_test.setValue(0);
-			du5_offtime.setValue(elapsedtime);
+			me.du5OffTimer = 1;
+			du5_offtime.setValue(elapsedtime_act);
 		}
-		
 	},
 	update: func() {
 		var elapsedtime = getprop("sim/time/elapsed-sec");
diff --git a/Models/Instruments/PFD/PFD.nas b/Models/Instruments/PFD/PFD.nas
index 77c41c11..7fe8e0a0 100644
--- a/Models/Instruments/PFD/PFD.nas
+++ b/Models/Instruments/PFD/PFD.nas
@@ -220,6 +220,7 @@ var canvas_PFD_base = {
 		"HDG_one","HDG_two","HDG_three","HDG_four","HDG_five","HDG_six","HDG_seven","HDG_digit_L","HDG_digit_R","HDG_error","HDG_group","HDG_frame","TRK_pointer","machError","ilsError","ils_code","ils_freq","dme_dist","dme_dist_legend","ILS_HDG_R","ILS_HDG_L",
 		"ILS_right","ILS_left","outerMarker","middleMarker","innerMarker","v1_group","v1_text","vr_speed","F_target","S_target","FS_targets","flap_max","clean_speed","ground","ground_ref","FPV","spdLimError"];
 	},
+	du1OffTimer: 0,
 	updateDu1: func() {
 		var elapsedtime_act = elapsedtime.getValue();
 		if (systems.ELEC.Bus.acEss.getValue() >= 110) {
@@ -240,11 +241,15 @@ var canvas_PFD_base = {
 					du1_test_time.setValue(-100);
 				}
 			}
-		} else {
+			me.du1OffTimer = 0;
+			du1_offtime.setValue(0);
+		} elsif (me.du1OffTimer == 0) {
 			du1_test.setValue(0);
+			me.du1OffTimer = 1;
 			du1_offtime.setValue(elapsedtime_act);
 		}
 	},
+	du6OffTimer: 0,
 	updateDu6: func() {
 		var elapsedtime_act = elapsedtime.getValue();
 		if (systems.ELEC.Bus.ac2.getValue() >= 110) {
@@ -265,8 +270,11 @@ var canvas_PFD_base = {
 					du6_test_time.setValue(-100);
 				}
 			}
-		} else {
+			me.du6OffTimer = 0;
+			du6_offtime.setValue(0);
+		} elsif (me.du6OffTimer == 0) {
 			du6_test.setValue(0);
+			me.du6OffTimer = 1;
 			du6_offtime.setValue(elapsedtime_act);
 		}
 	},
diff --git a/Models/Instruments/Upper-ECAM/Upper-ECAM.nas b/Models/Instruments/Upper-ECAM/Upper-ECAM.nas
index ae43662d..f99462a2 100644
--- a/Models/Instruments/Upper-ECAM/Upper-ECAM.nas
+++ b/Models/Instruments/Upper-ECAM/Upper-ECAM.nas
@@ -913,6 +913,7 @@ var canvas_upperECAM = {
 			me["Test_text"].show();
 		}
 	},
+	du3OffTimer: 0,
 	powerTransient: func() {
 		if (systems.ELEC.Bus.acEss.getValue() >= 110) {
 			if (du3_offtime.getValue() + 3 < pts.Sim.Time.elapsedSec.getValue()) {
@@ -932,8 +933,11 @@ var canvas_upperECAM = {
 					du3_test_time.setValue(-100);
 				}
 			}
-		} else {
+			me.du3OffTimer = 0;
+			du3_offtime.setValue(0);
+		} elsif (me.du3OffTimer == 0) {
 			du3_test.setValue(0);
+			me.du3OffTimer = 1;
 			du3_offtime.setValue(pts.Sim.Time.elapsedSec.getValue());
 		}
 	},