As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE EXPERIENCED COMPRESSOR STALL AT REDUCTION TO CLIMB POWER. ENGINE OPERATED NORMALLY AFTER THAT. RETURNED, EMERGENCY WAS DECLARED. PERFORMED BOROSCOPE. FOUND DAMAGE TO HIGH PPRESSURE COMPRESSOR, DAMAGE ON ALL 12TH AND 13TH STAGE BLADES. FOUND SOME BLADES WITH HALF OF BLADES BROKEN OFF. REMOVED AND REPLACED ENGINE IAW MCM 71-93-01. PERFORMED ENGINE RUN IAW MCM 71-95-22. SYSTEM CHECKED NORMAL.