B757-200
Flight Crew Air Transport Pilot (ATP)
Human-Machine Interface
Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Loss Of Aircraft Control
Flight Crew Rejected Takeoff
Aircraft; Human Factors
During the initial take-off roll; the engines spooled up asymmetrically resulting in significant deviation from centerline with full rudder deflection. The power was retarded to idle and we taxied clear of the runway. The speed at the time that we discontinued the take-off was less than 25 knots. After clearing the runway; we determined that what had happened was a result of not allowing the engines to spool up evenly to 1.10 EPR prior to selecting takeoff thrust. The subsequent take-off was normal. Failure to follow the Flight Manual procedure for take-off.
B757 Captain reports rejecting a takeoff when thrust does not increase evenly after auto thrust is selected resulting in loss of directional control.