Based on the evaluation and analysis of the suspect relax-band hand controller component, the following can be concluded: the failure of the hand controller was likely not due to any inherent design flaw.This is a very rare occurrence whose specific cause could not be determined.This customer is not under a dornier service contract.Therefore, dornier does not know the service capabilities or qualifications of the 3rd party that services the device, nor the service/maintenance history of this device.We believe the cause could be related to lack of proper inspection and maintenance at appropriate frequency by the 3rd party service contractor.There is no trend of this failure mode in the field on any units.(b)(4).
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