Narrative:

During takeoff on runway xyl; I performed an aborted takeoff due to engine 1 N1 rollback of approximately 10% at 70 KTS. All engine parameters were normal at our 'set thrust' call; then the EICAS; we noted that engine 1 N1 was indicating about 75%; initially set at 85.9%. The throttles were still in toga position; and the thrust command arc was still set to N1 target. No 'engine tla not toga' was present. Upon abort call and throttle reduction to idle was the 'engine tla not toga' cas message and master caution. Normal abort sequence and QRH 'mechanical irregularity action chart' for aborted takeoff was performed. Dispatch; chief pilot; and maintenance were notified. Deplaned passengers and flight was eventually cancelled.we had contract maintenance come out to resolve our engine 1 N1 rollback resulting in an aborted takeoff. It became apparent that one of the technicians smelled like alcohol. I asked the others on my crew to confirm my suspicion; and all three agreed.

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Original NASA ASRS Text

Title: EMB-175 Captain reported an aborted takeoff due to an engine roll-back.

Narrative: During takeoff on runway XYL; I performed an aborted takeoff due to engine 1 N1 rollback of approximately 10% at 70 KTS. All engine parameters were normal at our 'set thrust' call; then the EICAS; we noted that engine 1 N1 was indicating about 75%; initially set at 85.9%. The throttles were still in TOGA position; and the thrust command arc was still set to N1 target. No 'ENG TLA NOT TOGA' was present. Upon abort call and throttle reduction to idle was the 'ENG TLA NOT TOGA' CAS message and master caution. Normal abort sequence and QRH 'Mechanical Irregularity Action Chart' for Aborted Takeoff was performed. Dispatch; Chief Pilot; and Maintenance were notified. Deplaned passengers and flight was eventually cancelled.We had contract maintenance come out to resolve our engine 1 N1 rollback resulting in an aborted takeoff. It became apparent that one of the technicians smelled like alcohol. I asked the others on my crew to confirm my suspicion; and all three agreed.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.