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This is the HSI Indicator from the KCS-55A Compass System. This will be of primary interest to those who need a replacement KI-525A, or who are assembling a KCS-55A System and already have the other components.
Please look over all of the pictures and be sure it will fit your application.
As always, it's up to your mechanic to determine its airworthy condition.
Guaranteed to pass your inspection or your money back!