diff --git a/fuselage_design/fuselage_design_lib/accommodation_definitions.xml b/fuselage_design/fuselage_design_lib/accommodation_definitions.xml
index 1e2214e52e805227715d4e4fd91ea5257d7116e1..3a334c99ef3a39489a603e91b8abd941539b88b6 100644
--- a/fuselage_design/fuselage_design_lib/accommodation_definitions.xml
+++ b/fuselage_design/fuselage_design_lib/accommodation_definitions.xml
@@ -571,6 +571,23 @@
 					<unit>kg</unit>
 				</mass>
 			</slide>
+			<slide id="2" description="Description of the emergency slide.">
+				<name description="Name of the emergency slide.">
+					<value>OWE_slide</value>
+				</name>
+				<length description="Length of the emergency slide.">
+					<value>700</value>
+					<unit>inch</unit>
+				</length>
+				<width description="Width of the emergency slide.">
+					<value>100</value>
+					<unit>inch</unit>
+				</width>
+				<mass description="Empty mass of the emergency slide..">
+					<value>140</value>
+					<unit>kg</unit>
+				</mass>
+			</slide>
 	</emergency_slides>
 	<cabin_interior_masses description="Description of different cabin interior masses.">
 		<acoustic_and_thermal_insolation description="Mass of cabin floor covering in kg per m^2.">
diff --git a/fuselage_design/src/tube_and_wing/empirical/fuselage_design_tu_berlin/general/call_functions/estimatemasses.py b/fuselage_design/src/tube_and_wing/empirical/fuselage_design_tu_berlin/general/call_functions/estimatemasses.py
index 82677677dca2a922b91d4f799e17b608beef474a..186b27a8798c059acb86fe58ca6ab56136304482 100644
--- a/fuselage_design/src/tube_and_wing/empirical/fuselage_design_tu_berlin/general/call_functions/estimatemasses.py
+++ b/fuselage_design/src/tube_and_wing/empirical/fuselage_design_tu_berlin/general/call_functions/estimatemasses.py
@@ -18,6 +18,8 @@ def estimate_masses(dict_ac_exchange, dict_mod_config, fuselage_description, run
     """
     ''' initialize local parameter '''
     lavatory_mass = 0
+    over_wing_exit_flag = False
+    emergency_slide_mass = 0
     fuselage_design_masses = {}
     fuselage_mass_additions = 1
     maximum_uld_type_depth = 0
@@ -218,6 +220,34 @@ def estimate_masses(dict_ac_exchange, dict_mod_config, fuselage_description, run
          + fuselage_design_masses['fuselage_operator_item_masses']['full_size_trolley_catering_mass'])
 
     # Estimate emergency equipment masses
+    # Estimate mass of emergency slides
+    for key, value in dict_mod_config['select_specific_exit_types'].items():
+        if value is not None:
+            if value == 'Type A':
+                for i in range(0, len(dict_ac_exchange['dict_accommodation'][
+                    'accommodation_definitions']['emergency_slides']['slide'])):
+                    if dict_ac_exchange['dict_accommodation'][
+                        'accommodation_definitions']['emergency_slides']['slide'][i]['name']['value'] == 'dual_slide':       
+                        emergency_slide_mass += round(float(dict_ac_exchange['dict_accommodation'][
+                            'accommodation_definitions']['emergency_slides']['slide'][i]['mass']['value']), 2)
+            if 'OWE' in value and not over_wing_exit_flag:
+                over_wing_exit_flag = True
+                for i in range(0, len(dict_ac_exchange['dict_accommodation'][
+                    'accommodation_definitions']['emergency_slides']['slide'])):
+                    if dict_ac_exchange['dict_accommodation'][
+                        'accommodation_definitions']['emergency_slides']['slide'][i]['name']['value'] == 'OWE_slide':       
+                        emergency_slide_mass += round(float(dict_ac_exchange['dict_accommodation'][
+                            'accommodation_definitions']['emergency_slides']['slide'][i]['mass']['value']), 2)
+            elif not 'OWE' in value and value != 'Type A':
+                for i in range(0, len(dict_ac_exchange['dict_accommodation'][
+                    'accommodation_definitions']['emergency_slides']['slide'])):
+                    if dict_ac_exchange['dict_accommodation'][
+                        'accommodation_definitions']['emergency_slides']['slide'][i]['name']['value'] == 'single_slide':       
+                        emergency_slide_mass += round(float(dict_ac_exchange['dict_accommodation'][
+                            'accommodation_definitions']['emergency_slides']['slide'][i]['mass']['value']), 2)
+            
+    fuselage_design_masses['fuselage_operator_item_masses']['emergency_equipment_masses']['emergency_slide_mass'] = \
+        2 * emergency_slide_mass
     # Mass of first aid kits according to EU-OPS 1.745 -> one first aid kit per commenced 100 PAX
     fuselage_design_masses['fuselage_operator_item_masses']['emergency_equipment_masses']['first_aid_kit_mass'] = \
         (math.ceil(dict_ac_exchange['total_number_of_passengers'] / 100)
@@ -358,13 +388,13 @@ def estimate_masses(dict_ac_exchange, dict_mod_config, fuselage_description, run
          * (required_number_of_flight_attendants + dict_ac_exchange['total_number_of_passengers']))
 
     # Estimate total emergency equipment group mass
-    for operator_item, mass in \
+    for _, mass in \
             fuselage_design_masses['fuselage_operator_item_masses']['emergency_equipment_masses'].items():
         fuselage_design_masses['fuselage_operator_item_masses']['group_masses']['total_emergency_equipment_masses'] \
             += mass
 
     # Estimate total operator item group mass
-    for operator_item, mass in fuselage_design_masses['fuselage_operator_item_masses']['group_masses'].items():
+    for _, mass in fuselage_design_masses['fuselage_operator_item_masses']['group_masses'].items():
         fuselage_design_masses['fuselage_operator_item_masses']['total_group_mass'] += mass
 
     fuselage_design_masses['fuselage_operator_item_masses']['total_group_mass'] = \