As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FT # 2006, AIRCRAFT LEFT ENGINE-ERRATIC INCREASE AND DECREASE. FELT AIRCRAFT YAWING AND OBSERVED ENGINE INDICATIONS CLIMBING THROUGH 11,000 FEET; PERFORMED DFDR DATA DOWNLOAD AND READOUT ALL T/S DATA POINTS TO ENGINE 1 N1 SENSOR FAILED ENGINE 1 REMOVED AND REPLACED REF W/O 976135 LOGPAGE 2483976 ITEM 1.