diff --git a/src/mms/inc_private/mms_server_internal.h b/src/mms/inc_private/mms_server_internal.h
index 5e2f458d..569fe7e1 100644
--- a/src/mms/inc_private/mms_server_internal.h
+++ b/src/mms/inc_private/mms_server_internal.h
@@ -387,6 +387,13 @@ mmsServer_isIndexAccess(AlternateAccess_t* alternateAccess);
 LIB61850_INTERNAL bool
 mmsServer_isComponentAccess(AlternateAccess_t* alternateAccess);
 
+LIB61850_INTERNAL bool
+mmsServer_isAccessToArrayComponent(AlternateAccess_t* alternateAccess);
+
+LIB61850_INTERNAL MmsValue*
+mmsServer_getComponentOfArrayElement(AlternateAccess_t* alternateAccess, MmsVariableSpecification* namedVariable,
+        MmsValue* structuredValue);
+
 LIB61850_INTERNAL int
 mmsServer_getLowIndex(AlternateAccess_t* alternateAccess);
 
diff --git a/src/mms/iso_mms/server/mms_read_service.c b/src/mms/iso_mms/server/mms_read_service.c
index 1a658de4..5fc3827d 100644
--- a/src/mms/iso_mms/server/mms_read_service.c
+++ b/src/mms/iso_mms/server/mms_read_service.c
@@ -135,24 +135,6 @@ deleteValueList(LinkedList values)
     LinkedList_destroyStatic(values);
 }
 
-static bool
-isAccessToArrayComponent(AlternateAccess_t* alternateAccess)
-{
-    if (alternateAccess->list.array[0]->choice.unnamed->choice.selectAlternateAccess.alternateAccess != NULL)
-    {
-        if (alternateAccess->list.array[0]->choice.unnamed->
-                choice.selectAlternateAccess.alternateAccess->list.array[0]->choice.unnamed->choice.selectAlternateAccess.accessSelection.present ==
-                        AlternateAccessSelection__selectAlternateAccess__accessSelection_PR_component)
-        {
-            return true;
-        }
-        else
-            return false;
-    }
-    else
-        return false;
-}
-
 static MmsValue*
 getComponent(MmsServerConnection connection, MmsDomain* domain, AlternateAccess_t* alternateAccess, MmsVariableSpecification* namedVariable, char* variableName)
 {
@@ -205,59 +187,6 @@ exit_function:
     return retValue;
 }
 
-static MmsValue*
-getComponentOfArrayElement(AlternateAccess_t* alternateAccess, MmsVariableSpecification* namedVariable,
-        MmsValue* structuredValue)
-{
-    MmsValue* retValue = NULL;
-
-    if (isAccessToArrayComponent(alternateAccess))
-    {
-        Identifier_t component = alternateAccess->list.array[0]->choice.unnamed->choice.selectAlternateAccess.alternateAccess
-                ->list.array[0]->choice.unnamed->choice.selectAccess.choice.component;
-
-        if (component.size > 129)
-            goto exit_function;
-
-        MmsVariableSpecification* structSpec;
-
-        if (namedVariable->type == MMS_ARRAY)
-            structSpec = namedVariable->typeSpec.array.elementTypeSpec;
-        else if (namedVariable->type == MMS_STRUCTURE)
-            structSpec = namedVariable;
-        else
-            goto exit_function;
-
-        int i;
-        for (i = 0; i < structSpec->typeSpec.structure.elementCount; i++) {
-
-            if ((int) strlen(structSpec->typeSpec.structure.elements[i]->name)
-                    == component.size) {
-                if (strncmp(structSpec->typeSpec.structure.elements[i]->name,
-                        (char*) component.buf, component.size) == 0) {
-                    MmsValue* value = MmsValue_getElement(structuredValue, i);
-
-                    if (isAccessToArrayComponent(
-                            alternateAccess->list.array[0]->choice.unnamed->choice.selectAlternateAccess.alternateAccess)) {
-                        retValue =
-                                getComponentOfArrayElement(
-                                        alternateAccess->list.array[0]->choice.unnamed->choice.selectAlternateAccess.alternateAccess,
-                                        structSpec->typeSpec.structure.elements[i],
-                                        value);
-                    }
-                    else
-                        retValue = value;
-
-                    goto exit_function;
-                }
-            }
-        }
-    }
-
-exit_function:
-    return retValue;
-}
-
 static void
 alternateArrayAccess(MmsServerConnection connection,
 		AlternateAccess_t* alternateAccess, MmsDomain* domain,
@@ -278,12 +207,12 @@ alternateArrayAccess(MmsServerConnection connection,
 	        MmsValue* value = NULL;
 
 			if (numberOfElements == 0)
-			    if (isAccessToArrayComponent(alternateAccess)) {
+			    if (mmsServer_isAccessToArrayComponent(alternateAccess)) {
 			        if (namedVariable->typeSpec.array.elementTypeSpec->type == MMS_STRUCTURE) {
 			            MmsValue* structValue = MmsValue_getElement(arrayValue, index);
 
 			            if (structValue != NULL)
-			                value = getComponentOfArrayElement(alternateAccess,
+			                value = mmsServer_getComponentOfArrayElement(alternateAccess,
 			                        namedVariable, structValue);
 			        }
 			    }
diff --git a/src/mms/iso_mms/server/mms_server_common.c b/src/mms/iso_mms/server/mms_server_common.c
index 30d5118d..62f9e0d5 100644
--- a/src/mms/iso_mms/server/mms_server_common.c
+++ b/src/mms/iso_mms/server/mms_server_common.c
@@ -267,6 +267,77 @@ mmsServer_isComponentAccess(AlternateAccess_t* alternateAccess)
     return false;
 }
 
+bool
+mmsServer_isAccessToArrayComponent(AlternateAccess_t* alternateAccess)
+{
+    if (alternateAccess->list.array[0]->choice.unnamed->choice.selectAlternateAccess.alternateAccess != NULL)
+    {
+        if (alternateAccess->list.array[0]->choice.unnamed->
+                choice.selectAlternateAccess.alternateAccess->list.array[0]->choice.unnamed->choice.selectAlternateAccess.accessSelection.present ==
+                        AlternateAccessSelection__selectAlternateAccess__accessSelection_PR_component)
+        {
+            return true;
+        }
+        else
+            return false;
+    }
+    else
+        return false;
+}
+
+MmsValue*
+mmsServer_getComponentOfArrayElement(AlternateAccess_t* alternateAccess, MmsVariableSpecification* namedVariable,
+        MmsValue* structuredValue)
+{
+    MmsValue* retValue = NULL;
+
+    if (mmsServer_isAccessToArrayComponent(alternateAccess))
+    {
+        Identifier_t component = alternateAccess->list.array[0]->choice.unnamed->choice.selectAlternateAccess.alternateAccess
+                ->list.array[0]->choice.unnamed->choice.selectAccess.choice.component;
+
+        if (component.size > 129)
+            goto exit_function;
+
+        MmsVariableSpecification* structSpec;
+
+        if (namedVariable->type == MMS_ARRAY)
+            structSpec = namedVariable->typeSpec.array.elementTypeSpec;
+        else if (namedVariable->type == MMS_STRUCTURE)
+            structSpec = namedVariable;
+        else
+            goto exit_function;
+
+        int i;
+        for (i = 0; i < structSpec->typeSpec.structure.elementCount; i++) {
+
+            if ((int) strlen(structSpec->typeSpec.structure.elements[i]->name)
+                    == component.size) {
+                if (strncmp(structSpec->typeSpec.structure.elements[i]->name,
+                        (char*) component.buf, component.size) == 0) {
+                    MmsValue* value = MmsValue_getElement(structuredValue, i);
+
+                    if (mmsServer_isAccessToArrayComponent(
+                            alternateAccess->list.array[0]->choice.unnamed->choice.selectAlternateAccess.alternateAccess)) {
+                        retValue =
+                                mmsServer_getComponentOfArrayElement(
+                                        alternateAccess->list.array[0]->choice.unnamed->choice.selectAlternateAccess.alternateAccess,
+                                        structSpec->typeSpec.structure.elements[i],
+                                        value);
+                    }
+                    else
+                        retValue = value;
+
+                    goto exit_function;
+                }
+            }
+        }
+    }
+
+exit_function:
+    return retValue;
+}
+
 int
 mmsServer_getLowIndex(AlternateAccess_t* alternateAccess)
 {
diff --git a/src/mms/iso_mms/server/mms_write_service.c b/src/mms/iso_mms/server/mms_write_service.c
index 31a171e4..1c02a97a 100644
--- a/src/mms/iso_mms/server/mms_write_service.c
+++ b/src/mms/iso_mms/server/mms_write_service.c
@@ -479,7 +479,6 @@ handleWriteNamedVariableListRequest(
 
 }
 
-
 void
 mmsServer_handleWriteRequest(
 		MmsServerConnection connection,
@@ -501,7 +500,7 @@ mmsServer_handleWriteRequest(
 	    goto exit_function;
 	}
 
-        MmsServer_lockModel(connection->server);
+    MmsServer_lockModel(connection->server);
 
 	WriteRequest_t* writeRequest = &(mmsPdu->choice.confirmedRequestPdu.confirmedServiceRequest.choice.write);
 
@@ -639,6 +638,19 @@ mmsServer_handleWriteRequest(
                         goto end_of_main_loop;
                     }
 
+                    if (mmsServer_isAccessToArrayComponent(alternateAccess)) {
+                        MmsVariableSpecification* namedVariable = MmsDomain_getNamedVariable(domain, nameIdStr);
+
+                        if (namedVariable) {
+                            elementValue = mmsServer_getComponentOfArrayElement(alternateAccess, namedVariable, elementValue);
+                        }
+
+                        if ((namedVariable == NULL) || (elementValue == NULL)) {
+                            accessResults[i] = DATA_ACCESS_ERROR_OBJECT_NONE_EXISTENT;
+                            goto end_of_main_loop;
+                        }
+                    }
+
                     if (MmsValue_update(elementValue, value) == false) {
                         accessResults[i] = DATA_ACCESS_ERROR_TYPE_INCONSISTENT;
                         goto end_of_main_loop;