The button was pushed after a power dip lasting several milliseconds at 8:25 p.m. and the subsequent discovery that several pieces of mechanical equipment at the New York City Transit Rail Control Center stopped functioning.
Control center staff worked to get the equipment back into service. Then someone pushed the emergency button, causing all electrical equipment connected to one of the power distribution units at the center to lose power at 9:06 p.m. Power was restored by 10:30 p.m., according to the reports.
Officials blamed the loss of power on human error and the failure to restore power for 84 minutes to inadequate organizational structure and a lack of guidelines.
MTA acting chair and chief executive officer Janno Lieber said the agency will immediately reorganize how it maintains and manages the key systems that support the control center.