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Low Oil Pressure
If low oil pressure annunciator (OIL PRESS) illuminates, check oil pressure gauge to confirm low oil
pressure condition
If oil pressure and oil temp remain normal, it is possible the oil pressure sending until or relief valve
is malfunctioning
However, land at the nearest airport to inspect the source of trouble
If loss of oil pressure is accompanied by a rise in oil temperature, engine failure may be imminent
Reduce engine power immediately and select a suitable forced landing field. Use only the minimum
power required to reach the desired touchdown spot
Electrical Power Supply System Malfunctions
Excessive Rate of Charge
After 30 min of cruising flight, the ammeter should be indicating less than two needle widths of
charging current; if it remains above this value on a long flight the battery would overheat and
evaporate the electrolyte
The alternator control unit includes an overvoltage sensor, which normally automatically shuts
down the alternator if the charge voltage reaches approx. 31.5 volts
If overvoltage sensor malfunctions as evidenced by excessive rate of charge on the ammeter, the
alternator should be turned off, non-essential electrical equipment turned off and flight terminated
as soon as practical
Insufficient Rate of Charge
Illumination of the low voltage annunciator (VOLTS) and ammeter discharge indications may occur
during low RPM conditions with an electrical load on the system, such as during a low RPM taxi.
Under these conditions, the light will go out at higher RPM
May be a “nuisance” trip out so an attempt should be made to reactivate the alternator system
o Turn avionics master switch off (be aware that this will cause loss of GPS flight planning)
o Check alternator circuit breaker (ALT FLD) is in
o Turn both sides of the master switch off and then on again
o If problem no longer exists, normal alternator charging will resume and the low voltage
annunciator (VOLTS) will go off
o Avionics Master Switch may then be turned back on
o If annunciator illuminates again a malfunction is confirmed
o Flight should be terminated and or the current drain on the battery minimized
Windshield Damage
If a bird strike or other incident should damage the windshield in flight creating an opening a
significant loss of performance may be expected
This may be potentially minimized by opening a window while the airplane is maneuvered for
landing at the nearest airport
If airplane performance precludes landing at an airport, prepare for an “off airport” landing in
accordance with the Precautionary Landing with Engine Power or Ditching checklists’
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