As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AT 500 FEET, HAD 3 COMPRESSOR STALLS ON RT ENGINE, THROTTLE RETURNED TO IDLE. EMERGENCY DECLARED AND RETURNED TO SFO WITH ENGINE AT IDLE. VISUALLY INSPECTED ENGINE AND CHECKED ALL CHIP DETECTORS AND MAIN OIL FILTER, ALL OK. BORESCOPE INSPECTION FOUND DAMAGE BEYOND LIMITS TO HPC STAGE 16. REPLACED RT ENGINE.