From b8d47f346eb968b0d329035f72fc09a46f7116e6 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Fri, 1 Jun 2018 10:32:44 +1000
Subject: [PATCH] Copter: fixed interlock check on helis

the motors check is always false when disarmed, so can't be used for
arming check
---
 ArduCopter/AP_Arming.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ArduCopter/AP_Arming.cpp b/ArduCopter/AP_Arming.cpp
index 1732ed3c0f..14b7846239 100644
--- a/ArduCopter/AP_Arming.cpp
+++ b/ArduCopter/AP_Arming.cpp
@@ -597,7 +597,7 @@ bool AP_Arming_Copter::arm_checks(bool display_failure, bool arming_from_gcs)
 
     // if we are using motor interlock switch and it's enabled, fail to arm
     // skip check in Throw mode which takes control of the motor interlock
-    if (copter.ap.using_interlock && copter.motors->get_interlock()) {
+    if (copter.ap.using_interlock && copter.ap.motor_interlock_switch) {
         gcs().send_text(MAV_SEVERITY_CRITICAL,"Arm: Motor Interlock Enabled");
         return false;
     }