An operator error down at the power plant caused a brief blackout in Unalaska.

Public utilities director Dan Winters says an employee was performing maintenance at about 12:15 p.m. Tuesday. The person tripped the wrong breaker, accidentally turning off a diesel engine in the process.

Winters says there isn’t any backup system for an outage like that. Employees restarted the engine, and then reset the town breakers. The lights were only out for 14 minutes. Most of town was affected, except for the East Point Road neighborhood and the area near the spit dock.