Lane B Light + “Engine ECU”
A friend and I are ferrying a 912iS powered Kitfox halfway across the country. We flew the first two legs today: 3 hours, a half-hour break, then 2 hours.
On both legs, the Lane B light illuminated during cruise, after about an hour of flight. On the second leg, the Lane B light was shortly followed by an “ENGINE ECU” alert on the Garmin G3X.
During the first leg, both fuel pumps were operated continuously and during the second, only the #1 pump was running. Both legs were flown at wide open throttle.
In neither case was there any obvious change in engine performance. No roughness, no loss of power, nothing. The G3X monitors both voltage regulators; both were steady at 13.8V. Oil temperature and oil pressure are continuously in the green. Coolant temperature is probably a little low, at 160°F, but we were operating with OAT as low as -14°F and the cabin heater running the entire time.
This is a recent production engine (less than 2 years old) with probably under 100 hours total time. The engine is equipped with an Airmaster constant speed prop. Climb setting is ~5,450rpm and cruise setting is ~5,250rpm.
Neither of us has very much Rotax experience and we don’t have a BUDS dongle. Any help diagnosing these symptoms would be appreciated. If diagnosis isn’t possible, we would appreciate reassurance that an engine failure is not imminent.
Thanks!
