Jabiru Aircraft
Pilot Operating Handbook
Model J170-D
JP-FM-13
Revision:
0
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28 Feb 2020
Page 3-33
operation is restored, and the heat can be selected OFF. Carburettor heat should only
be selected ON or OFF, as partial heat application may exacerbate ice build-up. The
aircraft can be safely operated with carburettor heat applied for indefinite periods, but
there will be a slight power loss. Hence, carburettor heat should not be used when full
power is required; e.g. for take-off.
5.
LOW OIL PRESSURE If low oil pressure is accompanied by normal oil temperature,
there is a possibility that the oil pressure gauge or the relief valve is malfunctioning, and
an immediate precautionary landing is not warranted. A landing at the closest practical
airfield is advisable however so that the source of the trouble can be investigated. If a
total loss of oil pressure is accompanied by a rise in oil temperature, an engine failure is
probably imminent. Reduce engine power immediately and select a suitable forced
landing area. Use only the minimum power required to reach the desired touch down
point.
3.4.7
Electrical Systems Malfunctions
The electrical system is straight forward but to obtain the necessary degree of reliability and
redundancy the system must be operated correctly. Normal operation is with the Master
Switch in the ON position. Should the need to shed electrical loads arise the pilot should use
their discretion to turn off all non-essential electrical equipment. More severe electrical
system failures, such as those resulting in fire, require the Master Switch to be switched off.
In addition to the general guide above specific failures may be dealt with as follows.
1.
INSUFFICIENT RATE OF CHARGE If the “CHG FAIL” light illuminates in flight, minimal
or no electrical power is being supplied by the alternator. If the battery charge drops
sufficiently electrical systems will fail. While the Jabiru engine does not require external
power while running, devices such as radios, transponders, GPS units, and intercoms
will eventually drain the battery.
If the voltmeter indicates that no charge is being
supplied
, consideration should be given to landing at the nearest practical airfield, though
– provided the eventual total loss of electrical services will not affect the safety of flight
– the flight may continue.
2.
CIRCUIT BREAKERS Failure of an individual circuit will, in most circumstances, result
in opening of the relevant circuit/switch breaker. To ensure a permanent fault exists in
the circuit the breaker should be reset once. If the breaker again pops the circuit is faulty
and the flight should be continued without that service.
