diff --git a/ROMFS/px4fmu_common/init.d/4009_qav250 b/ROMFS/px4fmu_common/init.d/4009_qav250
index 12ae8b6ea9..f579400b83 100644
--- a/ROMFS/px4fmu_common/init.d/4009_qav250
+++ b/ROMFS/px4fmu_common/init.d/4009_qav250
@@ -4,9 +4,15 @@
 #
 # @type Quadrotor x
 #
+# @output MAIN1 motor1 (front right: CCW)
+# @output MAIN2 motor2 (back left: CCW)
+# @output MAIN3 motor3 (front left: CW)
+# @output MAIN4 motor4 (back right: CW)
+#
 # @output AUX1 feed-through of RC AUX1 channel
 # @output AUX2 feed-through of RC AUX2 channel
 # @output AUX3 feed-through of RC AUX3 channel
+# @output AUX4 feed-through of RC FLAPS channel
 #
 # @maintainer Mark Whitehorn <kd0aij@gmail.com>
 #
diff --git a/ROMFS/px4fmu_common/init.d/4050_generic_250 b/ROMFS/px4fmu_common/init.d/4050_generic_250
index 52de84d20f..1d81866b5a 100644
--- a/ROMFS/px4fmu_common/init.d/4050_generic_250
+++ b/ROMFS/px4fmu_common/init.d/4050_generic_250
@@ -4,9 +4,15 @@
 #
 # @type Quadrotor x
 #
+# @output MAIN1 motor1 (front right: CCW)
+# @output MAIN2 motor2 (back left: CCW)
+# @output MAIN3 motor3 (front left: CW)
+# @output MAIN4 motor4 (back right: CW)
+#
 # @output AUX1 feed-through of RC AUX1 channel
 # @output AUX2 feed-through of RC AUX2 channel
 # @output AUX3 feed-through of RC AUX3 channel
+# @output AUX4 feed-through of RC FLAPS channel
 #
 # @maintainer Mark Whitehorn <kd0aij@gmail.com>
 #