From b42759704fafd287623e3f78542823459ae3de37 Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Sun, 27 Dec 2020 13:59:30 +0000
Subject: [PATCH] KAP-140:

The ALT-ARM knob should only be arming the altitude interception when
the AP is activated. When rotating the AP alt-selector knob with
disabled AP, just the altitude alarm beep is configured.

From Benedikt Hallinger

Ticket-Id: https://sourceforge.net/p/flightgear/codetickets/2489/
---
 Aircraft/Generic/kap140.nas | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Aircraft/Generic/kap140.nas b/Aircraft/Generic/kap140.nas
index 4cfcfeed1..bd67de3eb 100644
--- a/Aircraft/Generic/kap140.nas
+++ b/Aircraft/Generic/kap140.nas
@@ -1327,6 +1327,12 @@ var armButton = func {
   #print("arm button");
 #  Disable button if too little power
   if (getprop(power) < minVoltageLimit) { return; }
+  
+  # Do nothing if the AP is not turned on
+  if (lockPitchMode.getValue() == pitchModes["OFF"]) {
+      lockPitchMode.setIntValue(pitchArmModes["OFF"]);
+      return;
+  }
 
   var pitchArm = lockPitchArm.getValue();