Air carrier captain reported rejecting takeoff when N1 vibration exceeded normal limits.

Attributes
ACN	1027054
Time
Date	201207
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 210 Flight Crew Total 14700 Flight Crew Type 1500
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Inbound write up 'eng N1 vib 7.7 on T/O climbout varied between 4.0 and 7.7. At cruise varies 1.4 to 3.0 maintenance accomplished task 77-32-00-810-807-a; no damage found; everything secure.' during takeoff prior to 80 KTS call my first officer called out N1 indication of 8.7 (we discussed during our briefing if above normal flight operations manual (fom) range of up to N1 of 5.0 we would abort); rejected takeoff engaged and we notified tower of our abort. Wheel brakes did not exceed 420; so we elected to taxi to the gate.

Original NASA ASRS Text

Title: Air carrier Captain reported rejecting takeoff when N1 vibration exceeded normal limits.

Narrative: Inbound write up 'Eng N1 vib 7.7 on T/O climbout varied between 4.0 and 7.7. At cruise varies 1.4 to 3.0 Maintenance accomplished Task 77-32-00-810-807-A; No damage found; everything secure.' During takeoff prior to 80 KTS call my First Officer called out N1 indication of 8.7 (we discussed during our briefing if above normal Flight Operations Manual (FOM) range of up to N1 of 5.0 we would abort); rejected takeoff engaged and we notified Tower of our abort. Wheel brakes did not exceed 420; so we elected to taxi to the gate.

Data retrieved from NASA's ASRS site as of July 2013 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.