diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5754910c..5f11fbb0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,12 @@ will consitute of a breaking change warranting a new major release:
   - Syrlinks assembly
   - Dual Lane Assembly
 
+## Fixed
+
+- Dual lane assemblies: Fix handling when health states are overwritten. Also add better handling
+  when some devices are permanent faulty and some are only faulty. In that case, only the faulty
+  devices will be restored.
+
 # [v1.43.1] 2023-04-04
 
 ## Fixed
diff --git a/mission/system/acs/AcsBoardAssembly.cpp b/mission/system/acs/AcsBoardAssembly.cpp
index 62fe316a..4893ce98 100644
--- a/mission/system/acs/AcsBoardAssembly.cpp
+++ b/mission/system/acs/AcsBoardAssembly.cpp
@@ -267,12 +267,45 @@ ReturnValue_t AcsBoardAssembly::checkAndHandleHealthStates(Mode_t commandedMode,
     HealthState h1 = healthHelper.healthTable->getHealth(o1);
     HealthState h2 = healthHelper.healthTable->getHealth(o2);
     HealthState h3 = healthHelper.healthTable->getHealth(o3);
+    // All device are faulty or permanent faulty, but this is a safe mode assembly, so we need
+    // to restore the devices.
     if ((h0 == FAULTY or h0 == PERMANENT_FAULTY) and (h1 == FAULTY or h1 == PERMANENT_FAULTY) and
         (h2 == FAULTY or h2 == PERMANENT_FAULTY) and (h3 == FAULTY or h3 == PERMANENT_FAULTY)) {
-      overwriteDeviceHealth(o0, h0);
-      overwriteDeviceHealth(o1, h1);
-      overwriteDeviceHealth(o2, h2);
-      overwriteDeviceHealth(o3, h3);
+      uint8_t numPermFaulty = 0;
+      if (h0 == PERMANENT_FAULTY) {
+        numPermFaulty++;
+      }
+      if (h1 == PERMANENT_FAULTY) {
+        numPermFaulty++;
+      }
+      if (h2 == PERMANENT_FAULTY) {
+        numPermFaulty++;
+      }
+      if (h3 == PERMANENT_FAULTY) {
+        numPermFaulty++;
+      }
+      if (numPermFaulty < 4) {
+        // Some are faulty and some are permanent faulty, so only set faulty ones to
+        // EXTERNAL_CONTROL.
+        if (h0 == FAULTY) {
+          overwriteDeviceHealth(o0, h0);
+        }
+        if (h1 == FAULTY) {
+          overwriteDeviceHealth(o0, h0);
+        }
+        if (h2 == FAULTY) {
+          overwriteDeviceHealth(o0, h0);
+        }
+        if (h3 == FAULTY) {
+          overwriteDeviceHealth(o0, h0);
+        }
+      } else {
+        // All permanent faulty, so set all to EXTERNAL_CONTROL
+        overwriteDeviceHealth(o0, h0);
+        overwriteDeviceHealth(o1, h1);
+        overwriteDeviceHealth(o2, h2);
+        overwriteDeviceHealth(o3, h3);
+      }
       healthNeedsToBeOverwritten = true;
     }
     if (h0 == EXTERNAL_CONTROL or h1 == EXTERNAL_CONTROL or h2 == EXTERNAL_CONTROL or
diff --git a/mission/system/acs/DualLaneAssemblyBase.cpp b/mission/system/acs/DualLaneAssemblyBase.cpp
index 788ec34e..7d22fbd1 100644
--- a/mission/system/acs/DualLaneAssemblyBase.cpp
+++ b/mission/system/acs/DualLaneAssemblyBase.cpp
@@ -117,7 +117,7 @@ ReturnValue_t DualLaneAssemblyBase::isModeCombinationValid(Mode_t mode, Submode_
   if (mode != MODE_OFF and (submode != A_SIDE and submode != B_SIDE and submode != DUAL_MODE)) {
     return HasModesIF::INVALID_SUBMODE;
   }
-  if(mode == MODE_OFF and submode != SUBMODE_NONE) {
+  if (mode == MODE_OFF and submode != SUBMODE_NONE) {
     return HasModesIF::INVALID_SUBMODE;
   }
   return returnvalue::OK;
diff --git a/mission/system/acs/ImtqAssembly.cpp b/mission/system/acs/ImtqAssembly.cpp
index c2e99171..e973a11b 100644
--- a/mission/system/acs/ImtqAssembly.cpp
+++ b/mission/system/acs/ImtqAssembly.cpp
@@ -35,7 +35,7 @@ ReturnValue_t ImtqAssembly::checkChildrenStateOn(Mode_t wantedMode, Submode_t wa
 
 ReturnValue_t ImtqAssembly::isModeCombinationValid(Mode_t mode, Submode_t submode) {
   if (mode == MODE_ON or mode == DeviceHandlerIF::MODE_NORMAL or mode == MODE_OFF) {
-    if(submode != SUBMODE_NONE) {
+    if (submode != SUBMODE_NONE) {
       return HasModesIF::INVALID_SUBMODE;
     }
     return returnvalue::OK;
diff --git a/mission/system/com/SyrlinksAssembly.cpp b/mission/system/com/SyrlinksAssembly.cpp
index c79e1f8f..b8063bbf 100644
--- a/mission/system/com/SyrlinksAssembly.cpp
+++ b/mission/system/com/SyrlinksAssembly.cpp
@@ -41,7 +41,7 @@ ReturnValue_t SyrlinksAssembly::isModeCombinationValid(Mode_t mode, Submode_t su
     }
     return returnvalue::OK;
   }
-  if(mode == MODE_OFF and submode != SUBMODE_NONE) {
+  if (mode == MODE_OFF and submode != SUBMODE_NONE) {
     return HasModesIF::INVALID_SUBMODE;
   }
   return returnvalue::OK;