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Aircraft Technical Manual
Jabiru Aircraft
Pty Ltd
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
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ISSUE
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Dated: 29th October 2014
Issued By: AS
Page: 260 of 298
11.8 Analogue Engine Gauges (all J-Series)
11.8.1 Description
The Oil Pressure, Oil Temperature, Voltage, Exhaust Gas Temperature (EGT, where equipped), hour
meter (where equipped) and Cylinder Head Temperature (CHT) Gauges are electronic instruments.
With the exception of the CHT gauge the instruments require power to operate which is supplied
from the main bus bar.
The CHT gauge does not require power
– it connects only to a thermocouple which is fitted to the
exhaust-side spark plug of the hottest cylinder of the engine.
11.8.2 Gauge Removal & Installation
Required Tools:
Tools as required in Section 11.2.2
Screwdrivers
Parts and Material:
N/A
Type of Maintenance:
Line Maintenance
Level of Certification:
L2 or LAME (A&P or LSA Repairman / Maintenance)
Return to Service:
L2 or LAME (A&P or LSA Repairman / Maintenance)
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 11-6
– Trouble Shooting – Engine Gauges
Trouble
Probable Cause
Remedy
Instrument fails to
operate
Circuit breaker(s) open
Check master and avionics
circuit breakers. Re-set if
necessary.
Defective mechanism
Substitute known-good
tachometer and check reading.
Replace instrument
Defective sensor
Replace sensor
Incorrect indication
Sensor not working correctly
Replace sensor
Poor connections
Check and repair wiring &
connections.