diff --git a/src/modules/navigator/MissionFeasibility/FeasibilityChecker.cpp b/src/modules/navigator/MissionFeasibility/FeasibilityChecker.cpp
index dbaf173efa..c35d2c1bde 100644
--- a/src/modules/navigator/MissionFeasibility/FeasibilityChecker.cpp
+++ b/src/modules/navigator/MissionFeasibility/FeasibilityChecker.cpp
@@ -46,12 +46,7 @@ FeasibilityChecker::FeasibilityChecker() :
 
 void FeasibilityChecker::reset()
 {
-	_mission_validity_failed = false;
-	_takeoff_failed = false;
-	_land_pattern_validity_failed = false;
-	_distance_between_waypoints_failed = false;
-	_fixed_wing_land_approach_failed = false;
-	_takeoff_land_available_failed = false;
+	_checks_failed.value = 0;
 
 	_found_item_with_position = false;
 	_has_vtol_takeoff = false;
@@ -155,11 +150,11 @@ bool FeasibilityChecker::processNextItem(mission_item_s &mission_item, const int
 		updateData();
 	}
 
-	if (!_mission_validity_failed) {
-		_mission_validity_failed = !checkMissionItemValidity(mission_item, current_index);
+	if (!_checks_failed.flags.mission_validity_failed) {
+		_checks_failed.flags.mission_validity_failed = !checkMissionItemValidity(mission_item, current_index);
 	}
 
-	if (_mission_validity_failed) {
+	if (_checks_failed.flags.mission_validity_failed) {
 		// if a mission item is not valid then abort the other checks
 		return false;
 	}
@@ -177,7 +172,7 @@ bool FeasibilityChecker::processNextItem(mission_item_s &mission_item, const int
 	}
 
 	if (current_index == total_count - 1) {
-		_takeoff_land_available_failed = !checkTakeoffLandAvailable();
+		_checks_failed.flags.takeoff_land_available_failed = !checkTakeoffLandAvailable();
 	}
 
 	_mission_item_previous = mission_item;
@@ -188,39 +183,39 @@ bool FeasibilityChecker::processNextItem(mission_item_s &mission_item, const int
 void FeasibilityChecker::doCommonChecks(mission_item_s &mission_item, const int current_index)
 {
 
-	if (!_distance_between_waypoints_failed) {
-		_distance_between_waypoints_failed = !checkDistancesBetweenWaypoints(mission_item);
+	if (!_checks_failed.flags.distance_between_waypoints_failed) {
+		_checks_failed.flags.distance_between_waypoints_failed = !checkDistancesBetweenWaypoints(mission_item);
 	}
 
 	if (!_first_waypoint_found) {
 		checkHorizontalDistanceToFirstWaypoint(mission_item);
 	}
 
-	if (!_takeoff_failed) {
-		_takeoff_failed = !checkTakeoff(mission_item);
+	if (!_checks_failed.flags.takeoff_failed) {
+		_checks_failed.flags.takeoff_failed = !checkTakeoff(mission_item);
 	}
 
-	if (!_items_fit_to_vehicle_type_failed) {
-		_items_fit_to_vehicle_type_failed = !checkItemsFitToVehicleType(mission_item);
+	if (!_checks_failed.flags.items_fit_to_vehicle_type_failed) {
+		_checks_failed.flags.items_fit_to_vehicle_type_failed = !checkItemsFitToVehicleType(mission_item);
 	}
 }
 
 void FeasibilityChecker::doVtolChecks(mission_item_s &mission_item, const int current_index, const int last_index)
 {
-	if (!_land_pattern_validity_failed) {
-		_land_pattern_validity_failed = !checkLandPatternValidity(mission_item, current_index, last_index);
+	if (!_checks_failed.flags.land_pattern_validity_failed) {
+		_checks_failed.flags.land_pattern_validity_failed = !checkLandPatternValidity(mission_item, current_index, last_index);
 	}
 
 }
 
 void FeasibilityChecker::doFixedWingChecks(mission_item_s &mission_item, const int current_index, const int last_index)
 {
-	if (!_land_pattern_validity_failed) {
-		_land_pattern_validity_failed = !checkLandPatternValidity(mission_item, current_index, last_index);
+	if (!_checks_failed.flags.land_pattern_validity_failed) {
+		_checks_failed.flags.land_pattern_validity_failed = !checkLandPatternValidity(mission_item, current_index, last_index);
 	}
 
-	if (!_fixed_wing_land_approach_failed) {
-		_fixed_wing_land_approach_failed = !checkFixedWindLandApproach(mission_item, current_index);
+	if (!_checks_failed.flags.fixed_wing_land_approach_failed) {
+		_checks_failed.flags.fixed_wing_land_approach_failed = !checkFixedWindLandApproach(mission_item, current_index);
 	}
 
 }
diff --git a/src/modules/navigator/MissionFeasibility/FeasibilityChecker.hpp b/src/modules/navigator/MissionFeasibility/FeasibilityChecker.hpp
index d0905d3635..1c002baf9a 100644
--- a/src/modules/navigator/MissionFeasibility/FeasibilityChecker.hpp
+++ b/src/modules/navigator/MissionFeasibility/FeasibilityChecker.hpp
@@ -77,12 +77,7 @@ public:
 	*/
 	bool someCheckFailed()
 	{
-		return _takeoff_failed ||
-		       _distance_between_waypoints_failed ||
-		       _land_pattern_validity_failed ||
-		       _fixed_wing_land_approach_failed ||
-		       _mission_validity_failed ||
-		       _takeoff_land_available_failed;
+		return _checks_failed.value != 0;
 	}
 
 	/**
@@ -110,14 +105,18 @@ private:
 	matrix::Vector2d _home_lat_lon = matrix::Vector2d((double)NAN, (double)NAN);
 	VehicleType _vehicle_type{VehicleType::RotaryWing};
 
-	// internal flags to keep track of which checks failed
-	bool _mission_validity_failed{false};
-	bool _takeoff_failed{false};
-	bool _land_pattern_validity_failed{false};
-	bool _distance_between_waypoints_failed{false};
-	bool _fixed_wing_land_approach_failed{false};
-	bool _takeoff_land_available_failed{false};
-	bool _items_fit_to_vehicle_type_failed{false};
+	union checks_failed_u {
+		struct {
+			bool mission_validity_failed : 1;
+			bool takeoff_failed : 1;
+			bool land_pattern_validity_failed : 1;
+			bool distance_between_waypoints_failed : 1;
+			bool fixed_wing_land_approach_failed : 1;
+			bool takeoff_land_available_failed : 1;
+			bool items_fit_to_vehicle_type_failed : 1;
+		} flags;
+		uint16_t value {0};
+	} _checks_failed{};
 
 	// internal checkTakeoff related variables
 	bool _found_item_with_position{false};