As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE COMPRESSOR STALL/SURGE AT LEVEL OFF - FL340 EPR WAS OBSERVED TO GO DOWN TO 1.6 EPR WITH ENGINE VIBRATION NOISE ASSOCIATED WITH COMPRESSOR STALL. AIRTURN BACK. R & R NR 2 ENGINE AS PER WORK CARD 70T0002 AND TESTED PER WORK CARD 70T0301-02. ALL PARAMETERS WITHIN LIMIT.