diff --git a/aviary/models/aircraft/advanced_single_aisle/advanced_single_aisle_FLOPS.csv b/aviary/models/aircraft/advanced_single_aisle/advanced_single_aisle_FLOPS.csv
index 86fd0b94e..96efaf8a6 100644
--- a/aviary/models/aircraft/advanced_single_aisle/advanced_single_aisle_FLOPS.csv
+++ b/aviary/models/aircraft/advanced_single_aisle/advanced_single_aisle_FLOPS.csv
@@ -46,6 +46,7 @@ aircraft:engine:fuel_flow_scaler_linear_term,1,unitless
 aircraft:engine:generate_flight_idle,True,unitless
 aircraft:engine:geopotential_alt,False,unitless
 aircraft:engine:ignore_negative_thrust,False,unitless
+aircraft:engine:interpolation_method,slinear,unitless
 aircraft:engine:mass_scaler,1.15,unitless
 aircraft:engine:num_engines,2,unitless
 aircraft:engine:num_fuselage_engines,0,unitless
diff --git a/aviary/variable_info/variable_meta_data.py b/aviary/variable_info/variable_meta_data.py
index 187ec3712..94d93b1f6 100644
--- a/aviary/variable_info/variable_meta_data.py
+++ b/aviary/variable_info/variable_meta_data.py
@@ -2166,7 +2166,10 @@
     default_value='slinear',
     types=str,
     desc="method used for interpolation on an engine deck's data file, allowable values are "
-    'table methods from openmdao.components.interp_util.interp',
+    'table methods from openmdao.components.interp_util.interp. Engine models only use the '
+    'methods avilable to the MetaModelSemiStructuredComp component. These are listed here: '
+    'https://openmdao.org/newdocs/versions/latest/features/building_blocks/components/'
+    'metamodelsemistructured_comp.html',
     multivalue=True,
 )