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Avionics Overview

  • Removed the button clicks on the soft buttons of GNS 430/530, KAP 140, KT 76C and KR 87. The volume knobs only click on their Off detent.

GNS 530/430

The GNS units shipped with the mod are exclusive to it. My changes should not affect GNS units in any other aircraft. The changes are discussed here.

KR 87 (ADF)

I forked the KR 87 mainly to enable persistence for its frequencies, to add an LCD ghost to the display, and to fix a tiny bug that has ben bothering me forever: changing frequencies or modes worked while the unit was off, as if it was a mechanical unit.

L:vars

R is read-only state; R/W can be set.

L:var R/W Meaning
DHC6_ALT_ALERT R Altitude alert state
DHC6_ALT_ALERT_LIGHT R Altitude alert lamp

Reviewed 2026-08-04.