Aircraft departed after it was removed from service due to maintenance work.

Attributes
ACN	1742098
Time
Date	202005
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Person 2
Function	Pilot Flying First Officer
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

Narrative:

At door closure; ramp agents informed us a fastener was not secure. I notified mx (maintenance) and they stated they'd send line mx out. Line secured the fastener. We then pushed. We received a message airborne that we had left with the aircraft out of service. I took full responsibility and apologized to dispatch - we simply had not been informed that we had been taken OTS (out of service); but I should have assumed so and contacted dispatch. We already had our performance solution so we had no communication or indication that we were OTS.communication from mx or dispatch that the aircraft was OTS would have avoided this; but I take full responsibility for not coordinating through dispatch.

Original NASA ASRS Text

Title: Aircraft departed after it was removed from service due to maintenance work.

Narrative: At door closure; ramp agents informed us a fastener was not secure. I notified Mx (Maintenance) and they stated they'd send line Mx out. Line secured the fastener. We then pushed. We received a message airborne that we had left with the aircraft Out of service. I took full responsibility and apologized to dispatch - we simply had not been informed that we had been taken OTS (Out of Service); but I should have assumed so and contacted dispatch. We already had our performance solution so we had no communication or indication that we were OTS.Communication from Mx or dispatch that the aircraft was OTS would have avoided this; but I take full responsibility for not coordinating through Dispatch.

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.