Aircraft Service Manual
Jabiru Aircraft
Pty Ltd
JTM001-1
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
REVISION
1
Dated: Nov 2011
Issued By: SW
Page: 207 of 233
Trouble
Probable Cause
Remedy
Oil pressure inaccurate /
fluctuating
Poor quality earth connection
between display and engine
Check connection, replace /
improve as required.
Tachometer inaccurate /
fluctuating
Wrong number of pulses set in
tachometer setup
Correct settings per
manufacturer’s instructions.
No resistor between display and
alternator
– some displays only
Some displays require a resistor
be installed between the display
and the alternator. Check
manuf
acturer’s installation
instructions and ensure resistor
is fitted where required.
GPS Data not displayed
No GPS source fitted
Install GPS
Connection between GPS and
display failed
Check and repair connection
Settings on Display or GPS
incorrect
Check settings and correct to
match manufacturer’s
recommendations.
15.10 MAGNETIC COMPASS
The Magnetic Compass is liquid-filled, with expansion provisions to compensate for temperature
changes. It is equipped with compensating magnets adjustable from the front of the case. No
maintenance is required on the compass except an occasional check on a compass rose for
adjustment and compensation.
15.11 GYRO INSTRUMENT PACKAGE (OPTION)
A vacuum pump driven Artificial Horizon and Directional Gyro, together with an electric Turn
Coordinator, is available as an option.
Where this option is provided, a different instrument panel fascia is fitted.
Repair should only be performed by an approved instrument workshop.
