As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - LEFT ENGINE EXPERIENCED OFF IDLE COMPRESSOR STALLS DESCENDING THROUGH 30,000 FEET. NO ABNORMAL INDICATING NOTED EXCEPT ENGINE WOULD NOT ACCELERATE AT LOWER ALTITUDE. ENGINE RESPONDED NORMALLY IN ALL RESPECTS. REMOVED AND REPLACED NR 1 ENGINE PER CARDS UN-014UN-020 AND CARD UN-016. PERFORMED ENGINE RUN-UP PER MM. NO LEAKS NOTED. OPS CHECK GOOD. (X)