Narrative:

I had a ferry flight that went out of service when a maintenance discrepancy was submitted. Maintenance at their departure airport told them they were good to go with the ferry permit; but they were not yet returned to service through the logbook. I didn't notice that they had taken off yet; but when the maintenance release form came through; I realized they were already in the air.I was not aware that the origin maintenance had told the ca (captain) he was good to go; and I was not watching as closely as I could have been to make sure he knew he was still out of service. I assumed he would know to wait for the in service message; but with a ferry flight; many pilots often get confused on the policies/procedures.there should be more clear guidance to pilots about non-routine flights; like test flights and ferry flights; that they need to be showing in service before departing; no matter what line maintenance or maintenance control tells them. The only thing I could have done differently is make sure the ca was aware that he needed to be in service in an maintenance release form status.

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Original NASA ASRS Text

Title: Air carrier Dispatcher and flight crew reported aircraft was ferried despite not being returned to service.

Narrative: I had a ferry flight that went out of service when a maintenance discrepancy was submitted. Maintenance at their departure airport told them they were good to go with the ferry permit; but they were not yet returned to service through the Logbook. I didn't notice that they had taken off yet; but when the maintenance release form came through; I realized they were already in the air.I was not aware that the origin Maintenance had told the CA (Captain) he was good to go; and I was not watching as closely as I could have been to make sure he knew he was still out of service. I assumed he would know to wait for the in service message; but with a ferry flight; many pilots often get confused on the policies/procedures.There should be more clear guidance to pilots about non-routine flights; like test flights and ferry flights; that they need to be showing in service before departing; no matter what Line Maintenance or Maintenance Control tells them. The only thing I could have done differently is make sure the CA was aware that he needed to be in service in an maintenance release form status.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.