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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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