EMB ERJ 145 ER/LR
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Time Pressure; Training / Qualification
Aircraft Equipment Problem Critical
Flight Crew Rejected Takeoff; Flight Crew Returned To Gate; General Maintenance Action
Procedure; Aircraft
Took Runway 36 for departure had TO-1 thrust set; bleeds on packs OFF because of an APU MEL. I set thrust in the detent and about 15-20 seconds later we received an ATTCS No Margin EICAS message. The Captain took the controls and performed the low speed abort as required. We taxied off the runway; ran the checklists; and called Maintenance. Per Maintenance instructions we returned to the gate where our Maintenance personnel met us after just arriving to fix another broken plane. It was a standard abort for a mandatory abort message. I suggest fixing the APU's; as Maintenance said having the engine bleeds ON with TO thrust and 36C degree temps likely caused the message.
During the takeoff roll with an inoperative APU; an EMB-145 EICAS alerted ATTCS NO MARGIN so the takeoff was rejected and the flight returned to the gate for maintenance.