diff --git a/src/lib/external_lgpl/tecs/tecs.h b/src/lib/external_lgpl/tecs/tecs.h
index 9a8882ab56..3104446a15 100644
--- a/src/lib/external_lgpl/tecs/tecs.h
+++ b/src/lib/external_lgpl/tecs/tecs.h
@@ -58,21 +58,33 @@ public:
 		_integ5_state(0.0f),
 		_integ6_state(0.0f),
 		_integ7_state(0.0f),
+		_last_throttle_dem(0.0f),
 		_last_pitch_dem(0.0f),
 		_vel_dot(0.0f),
 		_EAS(0.0f),
+		_TASmax(30.0f),
+		_TASmin(3.0f),
 		_TAS_dem(0.0f),
 		_TAS_dem_last(0.0f),
 		_hgt_dem_in_old(0.0f),
+		_hgt_dem_adj(0.0f),
 		_hgt_dem_adj_last(0.0f),
+		_hgt_rate_dem(0.0f),
 		_hgt_dem_prev(0.0f),
 		_TAS_dem_adj(0.0f),
+		_TAS_rate_dem(0.0f),
 		_STEdotErrLast(0.0f),
 		_underspeed(false),
 		_detect_underspeed_enabled(true),
 		_badDescent(false),
 		_climbOutDem(false),
 		_pitch_dem_unc(0.0f),
+		_STEdot_max(0.0f),
+		_STEdot_min(0.0f),
+		_THRmaxf(0.0f),
+		_THRminf(0.0f),
+		_PITCHmaxf(0.5f),
+		_PITCHminf(-0.5f),
 		_SPE_dem(0.0f),
 		_SKE_dem(0.0f),
 		_SPEdot_dem(0.0f),
@@ -85,10 +97,14 @@ public:
 		_STEdot_error(0.0f),
 		_SEB_error(0.0f),
 		_SEBdot_error(0.0f),
+		_DT(0.02f),
 		_airspeed_enabled(false),
 		_states_initalized(false),
 		_in_air(false),
-		_throttle_slewrate(0.0f)
+		_throttle_slewrate(0.0f),
+		_indicated_airspeed_min(3.0f),
+		_indicated_airspeed_max(30.0f)
+
 	{
 	}