EMERGENCY PROCEDURES
RSUK0287_POH_Cavalon Revision 2, Issue Date 24.06.2015 3-8
3.12 Warning and Caution Lights
3.12.1 GEN or Low Volt Indicator Light
The GEN lamp, when lit, indicates that there is no voltage being supplied from the
regulator circuit to the battery
.
It is normally lit when the engine is stationary or at very low rpm.
It is normally not lit in flight, but may be seen to pulse gently in low light conditions.
The LOW VOLT lamp, when lit, indicates that the available voltage from the battery has
dropped below 12v,
If both lamps are on with the engine running at more than 2,500rpm, then it is likely that the
charging circuit has failed, and that the aircraft is operating on battery power alone.
If only the LOW VOLT lamp is lit, then the aircraft voltage demand has exceeded supply,
and demand must be reduced in order for the lamp to extinguish. NOTE! When lit, this lamp
also indicates that the strobes, nav lights,landing lights and 12v socket (where fitted) have
been turned off automatically, with automatic reconnection when the supply exceeds
demand.
Required Action
ROTAX 912 ULS: If any of the indicators are permanently lit, switch off all unnecessary
electrical consumers and land at the nearest airfield where maintenance can be performed.
The battery is expected, if in good condition, to provide 30minutes of reserve power to
supply the aircraft instrumentation and avionics, after which time electrical equipment may
cease to function.
ROTAX 914 UL: If any of the indicators are permanently lit, switch off all
unnecessary electrical consumers and perform a precautionary landing within 30minutes.
The battery is expected, if in good condition, to provide 30minutes of reserve power to
supply the aircraft fuel pump, instrumentation and avionics, after which time electrical
equipment may cease to function and fuel supply to the engine lost. Be prepared for an
engine failure.
Further information (914UL).
No power in the cabin indicates either the main circuit fuse has failed, or that the
battery has failed and the pump protection relay has opened. In this case the P1
primary fuel pump remains powered by the regulator directly, maintaining fuel supply
to the engine. The turbo control unit is not powered in this instance, and will remain
in whatever position it was in when power was lost – so mixture and manifold
pressure control will be lost. Take care to only use the minimum power required to
land safely to prevent engine damage.
In this case the primary fuel pump will continue to run until the engine alternator
stops providing electrical energy. If required, fuel supply can be shut off via the fuel
cock located behind the seats.
NOTE
A gently pulsed GEN indicator light (visible in low light conditions) is normal
and indicates proper function of the generator.
3.12.2 Low Volt
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