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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: 204 of 233
Trouble
Probable Cause
Remedy
Instrument fails to
operate
Circuit breaker open
Check master and avionics
circuit breakers. Re-set if
necessary.
Defective mechanism
Substitute known-good
tachometer and check reading.
Replace instrument
Incorrect indication
Sensor not positioned correctly
Adjust sensor per Engine Manual
Instructions.
Analogue Tacho: Incorrectly set
dip-switches or tachometer
programming.
Check switch positions /
programming as appropriate to
the tachometer. Refer to engine
manuals.
Hand oscillates
Same probable causes as for
“Incorrect Indication” above.
See remedies for “incorrect
indication” above.
Figure 179
– Hall Effect Sensor Wiring (For Tach with Jabiru Logo on Face)