Pilot Operating Handbook
Cavalon Pro
SECTION 3
EMERGENCY PROCEDURES
RotorSport_POH_Cavalon Pro
Revision 1.0 – Issue 2 Date 16 03 2016
3-9
3.9
Warning and Caution Lights
3.9.1
GEN or Low Volt Indicator Light
The GEN lamp, when lit, indicates that there is no voltage being supplied from the
internal generator/regulator circuit to the battery. The Gen2 lamp, when lit, indicates
that there is no voltage being supplied from the external generator to the battery.
Both are normally lit when the engine is stationary or at very low rpm.
These lamps are 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 the GEN and GEN2 lamps and the LOW VOLT lamp are on with the engine running at
more than 2,500rpm, then it is likely that the charging circuits have 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, anti-collision lights and 12v socket have been
turned off automatically, with automatic reconnection when the supply exceeds demand.
Required Action
If any of the indicators are permanently lit, switch off all unnecessary electrical consumers, it
is recommended to perform a precautionary landing within 30 minutes. The battery is
expected, if in good condition, to provide 30 minutes* of reserve power to supply the aircraft
P2 fuel pump, instrumentation and avionics, after which time this electrical equipment may
cease to function. In the event of battery failure the P1 fuel pump is supplied with electrical
power directly from the engine’s internal generator so the engine may continue to run.
However, be prepared for an engine failure.
*depends on condition of battery
Further information:
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 (P1) fuel pump will continue to run until the engine’s internal
generator stops providing electrical energy. If required, fuel supply can be shut off
via the fuel shut-off valve.
