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Very interesting. The S-TEC 60-2 also operates off the turn coordinator for roll input. It is implicated in the Jacoby V-35B accident in Newark a year ago. Evidence indicates that the turn coordinator guro was not turning at impact. Have you done any flight tests to determine the if autopilot circuitry disengages under these circumstances? Evidence suggests it did not in Jacoby's accident. Jeff Edwards
AvSafe -- Aircraft Accident Investigations LIVP #456

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