Narrative:

This happened right after I had taken over the shift; accepting the turn over from the morning dispatcher. I was getting ready my computer and setting up the necessary software.during taxi; operations from the bridge gave me a phone call. He stated [the] aircraft was out of service and should not take off for some maintenance issue. Next; I called the FAA tower and ask them to stop the airplane; following this action with an ACARS to the crew asking them to stop and give me a phone call.I got a message coming from dispatch auto the aircraft was declared out of service while taxing and I confirmed with operations. Maintenance never contacted the controlling dispatcher to let me know what was going on. When [the] captain called and I conferenced in maintenance controller; he said that; apparently; the aircraft should have been stopped several legs before for an engine egt (exhaust gas temperature) over temperature (according to company regulations); and that he had been working all morning long on a possible ferry. He also affirmed aircraft should have been stopped previously and never was for some unknown reason.I was never contacted nor [did I get] on my turnover any reference to the aircraft being out of service or possibly out of service. Aircraft came back to the gate with no further issue.when I worked for my previous airline we had an automatic message that would be sent to the ACARS every time and aircraft became out of service. I think this would help in situations like this.the new procedure for no closeout for maintenance hold actually saved the day; along with our pertinent communication with the tower and crew.maintenance needs to communicate with the controlling dispatcher with the pertinent information that will affect the direct safety of the flight.

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Original NASA ASRS Text

Title: A Dispatcher reported an MD-83 was dispatched when it should have been out of service.

Narrative: This happened right after I had taken over the shift; accepting the turn over from the morning dispatcher. I was getting ready my computer and setting up the necessary software.During taxi; Operations from the bridge gave me a phone call. He stated [the] aircraft was out of service and should not take off for some maintenance issue. Next; I called the FAA tower and ask them to stop the airplane; following this action with an ACARS to the crew asking them to stop and give me a phone call.I got a message coming from dispatch auto the aircraft was declared out of service while taxing and I confirmed with operations. Maintenance never contacted the controlling dispatcher to let me know what was going on. When [the] captain called and I conferenced in maintenance controller; he said that; apparently; the aircraft should have been stopped several legs before for an Engine EGT (Exhaust Gas Temperature) over temperature (according to company regulations); and that he had been working all morning long on a possible ferry. He also affirmed aircraft should have been stopped previously and never was for some unknown reason.I was never contacted nor [did I get] on my turnover any reference to the aircraft being out of service or possibly out of service. Aircraft came back to the gate with no further issue.When I worked for my previous airline we had an automatic message that would be sent to the ACARS every time and aircraft became out of service. I think this would help in situations like this.The new procedure for No closeout for maintenance hold actually saved the day; along with our pertinent communication with the tower and crew.Maintenance needs to communicate with the controlling dispatcher with the pertinent information that will affect the direct safety of the flight.

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.