diff --git a/ROMFS/px4fmu_common/init.d/10015_tbs_discovery b/ROMFS/px4fmu_common/init.d/10015_tbs_discovery
index 2c7c0d68e2..0dd4837644 100644
--- a/ROMFS/px4fmu_common/init.d/10015_tbs_discovery
+++ b/ROMFS/px4fmu_common/init.d/10015_tbs_discovery
@@ -28,3 +28,10 @@ set MIXER quad_w
 
 set PWM_OUT 1234
 set PWM_MIN 1200
+
+set MIXER_AUX pass
+set PWM_AUX_RATE 50
+set PWM_AUX_OUT 1234
+set PWM_AUX_DISARMED 1000
+set PWM_AUX_MIN 1000
+set PWM_AUX_MAX 2000
diff --git a/ROMFS/px4fmu_common/mixers/pass.aux.mix b/ROMFS/px4fmu_common/mixers/pass.aux.mix
new file mode 100644
index 0000000000..8e7011f0ed
--- /dev/null
+++ b/ROMFS/px4fmu_common/mixers/pass.aux.mix
@@ -0,0 +1,21 @@
+# Manual pass through mixer for servo outputs 1-4
+
+# AUX1 channel (select RC channel with RC_MAP_AUX1 param)
+M: 1
+O:      10000  10000      0 -10000  10000
+S: 3 5  10000  10000      0 -10000  10000
+
+# AUX2 channel (select RC channel with RC_MAP_AUX2 param)
+M: 1
+O:      10000  10000      0 -10000  10000
+S: 3 6  10000  10000      0 -10000  10000
+
+# AUX3 channel (select RC channel with RC_MAP_AUX3 param)
+M: 1
+O:      10000  10000      0 -10000  10000
+S: 3 7  10000  10000      0 -10000  10000
+
+# FLAPS channel (select RC channel with RC_MAP_FLAPS param)
+M: 1
+O:      10000  10000      0 -10000  10000
+S: 3 4  10000  10000      0 -10000  10000