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Aircraft Maintenance Troubleshoot > Directional Gyro

Insufficient vacuum to directional gyro. If vacuum indication is below 4.25 IN.

HG. -problem might be:

Vacuum regulating valve improperly adjusted.
Pump failure.
Vacuum line kinked, leaking or too long for its diameter.

vacuum regulator

Vacuum Regulator

white filter should be replaced often (part number is RAB3-5-1)

Broken Vacuum Pump

vacuum pump uses carbon vanes and rotor.

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Disclaimer: sacskyranch.com contains abundant information relating to aircraft maintenance. The information provided is not intended to supercede or supplement the F.A.A. approved maintenance and/or operator’s manuals. Those F.A.A. approved manuals must be utilized when performing maintenance and/or operating aircraft.