EMB ERJ 170/175 ER/LR
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Total 1400
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance
Flight Crew Rejected Takeoff; Flight Crew Returned To Gate; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft; Procedure
After being cleared for takeoff and aligned on the runway; the First Officer took control of the aircraft; pushed the throttles up approximately 40% and checked even spool up. After an increase in throttles the autothrottles caught and increased thrust to N1 Target. The Pilot Flying said 'Check Thrust'; The Pilot Monitoring said 'Thrust Checks'. Shortly thereafter (below 80 kts.) the EICAS message 'ENG TLA not TOGA' (Amber) appeared and the master caution illuminated. The Captain called for the rejected take off and took control of the aircraft. We brought the aircraft to a stop and exited the runway. We taxied back to the ramp. One Maintenance employee boarded the aircraft and ran an autotrottle diagnostic. He said he did not find any issues. We refueled; took off; and flew without further incident to our destination. The EICAS message display and alert sound below 80 kts. caused the crew to abort the takeoff in accordance with the takeoff briefing. Maintenance was not able to duplicate the problem and the subsequent takeoff was successful. I cannot diagnose a root cause for this incident.
Took runway after checklists were completed; including an auto throttle arm check on the PFD. Began takeoff roll. PF (Pilot Flying) called 'check thrust' and PM (Pilot Monitoring) verified and verbalized 'thrust checked.' Shortly into takeoff roll (approximately 40 kts.). Crew got EICAS 'engine TLA not TOGA.' Immediate abort of takeoff. Maintenance inspected and found no abnormalities. Crew took the plane back out and conducted flight with no abnormalities.After debriefing the aborted takeoff; PF remembered feeling auto throttle take throttles upon spool up. PM also checked thrust and verified target N1 matched throttle setting. Also saw the AT flash as it armed on takeoff roll. Cause of EICAS message unknown. Without knowing the cause exactly; can't contribute any valid suggestions based on the findings.
ERJ-175 flight crew reported that after 80 kts; EICAS message ENG TLA not TOGA appeared; causing a rejected takeoff and return to gate for Maintenance.