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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: 203 of 233
For installation, reverse removal steps listed above.
Figure 178
– Alternate Static Source Assy
15.7 ANALOGUE TACHOMETER
15.7.1 DESCRIPTION
Jabiru Aircraft may be equipped with an analogue tachometer or a digital RPM read-out as a part of
an engine monitoring system.
Analogue tachometers are driven by a variety of sensors, depending on the aircraft model. In some
the sensor is positioned so that the teeth of the flywheel ring gear pass close by and produce a
signal. In others the same sensor reads off metal tags bolted to the flywheel. Finally, in some
aircraft a sensor is mounted on the alternator mount plate and produces a signal from the ignition
magnets.
Refer to the engine instruction & maintenance manuals for additional details.
15.7.2 REMOVAL & INSTALLATION
Remove the instrument panel fascia as detailed above.
Disconnect the instrument.
Undo the fasteners and remove the instrument from the fascia.
For installation, reverse removal steps above.
Table 19
– Trouble Shooting – Tachometer
Trouble
Probable Cause
Remedy