diff --git a/src/blackcore/context/contextsimulatorimpl.cpp b/src/blackcore/context/contextsimulatorimpl.cpp
index 0267ead66..3fe5d237c 100644
--- a/src/blackcore/context/contextsimulatorimpl.cpp
+++ b/src/blackcore/context/contextsimulatorimpl.cpp
@@ -386,8 +386,6 @@ namespace BlackCore
             Q_ASSERT(c);
             c = connect(simulator, &ISimulator::physicallyAddingRemoteModelFailed, this, &CContextSimulator::addingRemoteAircraftFailed);
             Q_ASSERT(c);
-            c = connect(simulator, &ISimulator::receivedRequestedElevation, this, &CContextSimulator::onReceivedRequestedElevation);
-            Q_ASSERT(c);
             c = connect(simulator, &ISimulator::ownAircraftModelChanged, this, &IContextSimulator::ownAircraftModelChanged);
             Q_ASSERT(c);
             c = connect(simulator, &ISimulator::aircraftRenderingChanged, this, &IContextSimulator::aircraftRenderingChanged);
@@ -423,8 +421,10 @@ namespace BlackCore
             m_simulatorPlugin.second = simulator;
 
             // Emit signal after this function completes
+            QPointer<CContextSimulator> myself(this);
             QTimer::singleShot(0, this, [ = ]
             {
+                if (!myself) { return; }
                 emit this->simulatorPluginChanged(simulatorPluginInfo);
             });
 
@@ -601,12 +601,6 @@ namespace BlackCore
             emit getIContextOwnAircraft()->changedAircraftCockpit(ownAircraft, IContextSimulator::InterfaceName());
         }
 
-        void CContextSimulator::onReceivedRequestedElevation(const CElevationPlane &plane, const CCallsign &callsign)
-        {
-            if (!this->isSimulatorAvailable()) { return; }
-            emit this->receivedRequestedElevation(plane, callsign);
-        }
-
         void CContextSimulator::xCtxChangedRemoteAircraftModel(const CSimulatedAircraft &aircraft, const BlackMisc::CIdentifier &originator)
         {
             if (CIdentifiable::isMyIdentifier(originator)) { return; }
diff --git a/src/blackcore/context/contextsimulatorimpl.h b/src/blackcore/context/contextsimulatorimpl.h
index 37d711846..e01b997c6 100644
--- a/src/blackcore/context/contextsimulatorimpl.h
+++ b/src/blackcore/context/contextsimulatorimpl.h
@@ -147,11 +147,6 @@ namespace BlackCore
                 BlackMisc::CSimpleCommandParser::registerCommand({".ris parts on|off", "aircraft parts (global setup)"});
             }
 
-        signals:
-            //! A requested elevation has been received
-            //! \remark only meant to be used locally, not via DBus
-            void receivedRequestedElevation(const BlackMisc::Geo::CElevationPlane &plane, const BlackMisc::Aviation::CCallsign &callsign);
-
         protected:
             //! Constructor
             CContextSimulator(CCoreFacadeConfig::ContextMode, CCoreFacade *runtime);
@@ -204,9 +199,6 @@ namespace BlackCore
             //! Simulator has changed cockpit
             void onCockpitChangedFromSimulator(const BlackMisc::Simulation::CSimulatedAircraft &ownAircraft);
 
-            //! Received elevation
-            void onReceivedRequestedElevation(const BlackMisc::Geo::CElevationPlane &plane, const BlackMisc::Aviation::CCallsign &callsign);
-
             //! Failed adding remote aircraft
             void addingRemoteAircraftFailed(const BlackMisc::Simulation::CSimulatedAircraft &remoteAircraft, const BlackMisc::CStatusMessage &message);
 
diff --git a/src/blackmisc/genericdbusinterface.h b/src/blackmisc/genericdbusinterface.h
index 4aac85615..27e6e8889 100644
--- a/src/blackmisc/genericdbusinterface.h
+++ b/src/blackmisc/genericdbusinterface.h
@@ -43,8 +43,10 @@ namespace BlackMisc
 
         //! For each signal in parent, attempt to connect to it an interface signal of the same name.
         //! \see BLACK_NO_RELAY
+        //! \deprecated KB 2018-08 this seems to be not used anymore and might be removed
         void relayParentSignals()
         {
+            Q_ASSERT_X(false, Q_FUNC_INFO, "crosscheck if still used");
             const QMetaObject *metaObject = this->parent()->metaObject();
             const QMetaObject *superMetaObject = metaObject;
             while (strcmp(superMetaObject->superClass()->className(), "QObject") != 0) { superMetaObject = superMetaObject->superClass(); }