Narrative:

After pushback; with parking brake set; both engines running; APU off and after both pilots had completed their after start flows; we experienced a flap fault and slat fault. Approximately one minute later we experienced an uncommanded simultaneous dual engine failure and associated loss of all AC power.we restored power by starting the APU and had the aircraft towed back to the gate.maintenance re-set the flap and slat control system successfully. Next they ran the engines at the gate and were unable to duplicate the problem. They advised that they were planning to sign the aircraft off as airworthy and return it to service.maintenance did not attempt to determine the reason for the dual engine failure; did not intend to make such a determination; had no plan to prevent a similar dual engine failure from happening again and intended to return the aircraft to service.after consulting with the dispatcher; I refused to accept the aircraft.I later observed the aircraft being connected to a super-tug; presumably to be towed to the hangar.suggestion: require that maintenance determine why a [dual] engine failure occurred and take action to prevent it from occurring again prior to deeming the aircraft airworthy and returning it to service.

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Original NASA ASRS Text

Title: A319 flight crew reported refusing aircraft due to a maintenance inability to determine cause of a dual engine failure after pushback from gate.

Narrative: After pushback; with parking brake set; both engines running; APU off and after both pilots had completed their after start flows; we experienced a Flap Fault and Slat Fault. Approximately one minute later we experienced an uncommanded simultaneous dual engine failure and associated loss of all AC power.We restored power by starting the APU and had the aircraft towed back to the gate.Maintenance re-set the flap and slat control system successfully. Next they ran the engines at the gate and were unable to duplicate the problem. They advised that they were planning to sign the aircraft off as airworthy and return it to service.Maintenance did not attempt to determine the reason for the dual engine failure; did not intend to make such a determination; had no plan to prevent a similar dual engine failure from happening again and intended to return the aircraft to service.After consulting with the Dispatcher; I refused to accept the aircraft.I later observed the aircraft being connected to a super-tug; presumably to be towed to the hangar.Suggestion: Require that Maintenance determine why a [dual] engine failure occurred and take action to prevent it from occurring again prior to deeming the aircraft airworthy and returning it to service.

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.