Index: src/order_cmd.cpp
===================================================================
--- src/order_cmd.cpp	(revision 12850)
+++ src/order_cmd.cpp	(working copy)
@@ -1046,6 +1046,15 @@
 				if (src->cargo_type != dst->cargo_type && (IsCargoInClass(src->cargo_type, CC_PASSENGERS) || IsCargoInClass(dst->cargo_type, CC_PASSENGERS)))
 					return CMD_ERROR;
 			}
+            /* Normal aircraft can't copy all the orders from helicopters (and visa versa) */
+            if (src->type == VEH_AIRCRAFT) {
+                const Order *order;
+                FOR_VEHICLE_ORDERS(src,order) {
+                    const Station *st = GetStation(order->GetDestination());
+                    if (!CanAircraftUseStation(dst->engine_type, st))
+                        return CMD_ERROR;
+                }
+            }
 
 			/* Is the vehicle already in the shared list? */
 			{
@@ -1107,6 +1116,15 @@
 					}
 				}
 			}
+            /* Normal aircraft can't copy all the orders from helicopters (and visa versa) */
+            if (src->type == VEH_AIRCRAFT) {
+                const Order *order;
+                FOR_VEHICLE_ORDERS(src,order) {
+                    const Station *st = GetStation(order->GetDestination());
+                    if (!CanAircraftUseStation(dst->engine_type, st))
+                        return CMD_ERROR;
+                }
+            }
 
 			/* make sure there are orders available */
 			delta = dst->IsOrderListShared() ? src->num_orders + 1 : src->num_orders - dst->num_orders;