As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COMPRESSOR STALL AT 370 ON LEFT ENGINE. ENGINE WOULD NOT PRODUCE REQUESTED THRUST. RAN QRH AND ELECTED TO KEEP THE ENGINE AT IDLE THRUST FOR THE REMAINING DURATION OF FLIGHT. NO ABNORMAL INDICATIONS AT IDLE THRUST ON LEFT ENGINE. REMOVED AND REPLACED THE HYDRO MECHANICAL UNIT IAW AMM 73-21-14-4. OPS CHECK AND LEAK CHECK GOOD. PERFORMED 83% MPA HIGH POWER ENGINE RUN ON LT ENGINE. ENGINE VALUES ON TARGET. NO FLUTTERING OR STALLING FELT OR SUSPECTED. A/C OK FOR SERVICE.