As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENG HAD MULTIPLE COMPRESSOR STALLS AT FL310 AS THROTTLES RETARDED FROM CLIMB EPR TO CRUISE EPR OF 1.96. COMPRESSOR STALLS STOPPED AS THROTTLES WERE PULLED TO IDLE THE ENG WAS NOT SHUTDOWN AND OPERATED NORMALLY AT IDLE. REPLACED C2 FAN FOR SEAL LIBERATION.