At 1559hrs Engine company 817 are alerted to respond for an apartment fire in company 21 first due. while enroute the first engine went not scene with smoke showing from division 2 on the Charlie side. engine 817 arrived on scene and deployed our 400ft attack line and extended it with the high-rise pack and went to side Charlie and stood by for an assignment from command. crew operated for approximately 1hr and 30mins before returning to service.