G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air Page 5-87
190-00682-01 Revision F
5.24 Standby Altimeter Troubleshooting
5.24.1
Standby Altimeter Common Problems
Symptom Recommended Action
Altimeter lighting is inoperative or
malfunctioning
• Perform the Standby Instrument Electrical Power Checks in Section 8.1.5.
• Remove standby altimeter per Section 6.24 and inspect the electrical
connector.
• Check that electrical power is being appropriately supplied to the
instrument.
√ If the input electrical power is not adequate, troubleshoot the wiring
harness.
√ If the input electrical power is appropriate, replace the standby
altimeter or contact the manufacturer for further troubleshooting.
Altimeter Vibrator is inoperative or
malfunctioning
Altitude displayed is incorrect
• Using a pitot-static ramp tester, check altitude displayed on standby
altimeter against altitude display from ADC2.
√ If the altitudes are the same, inspect the pitot/static ports and associated
equipment for faults.
√ If the altitudes are different, replace the standby altimeter or contact the
manufacturer for further troubleshooting. See Section 6.24 for removal
instructions.
5.25 Standby Battery Troubleshooting
Refer to King Air Series Component Maintenance Manual, listed in Table 1-2, for troubleshooting.
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