RV-12 in flight checking AP74 AP - working fine, air very rough, so I turned off AP; got voice confirmation of AP off.
Then a continuous alarm tone sounded....could not determine its source.
Nothing highlighted
Nothing blinking
No alarm bar
No alarm menu
No voice announcement of alarm
No "Show [page]" button shown
No "silence" button displayed.
Engine analog indications of oil temp/pressue, etc normal
Made immediate landing.
Turned off power to D-180 and recycled power. Tone then gone. Taxi back to hangar..no alarms, engine fine.
What could have been the cause?
This was posted on the Dynon forum but no responses received.
Then a continuous alarm tone sounded....could not determine its source.
Nothing highlighted
Nothing blinking
No alarm bar
No alarm menu
No voice announcement of alarm
No "Show [page]" button shown
No "silence" button displayed.
Engine analog indications of oil temp/pressue, etc normal
Made immediate landing.
Turned off power to D-180 and recycled power. Tone then gone. Taxi back to hangar..no alarms, engine fine.
What could have been the cause?
This was posted on the Dynon forum but no responses received.