As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FROM REDUCING THRUST AT CRUISE FOR DECENT HEARD & FELT A LOUD BANG. FLIGHT ATTENDANT REPORTS LOUDEST IN CTR OF CABIN. ENGINE INDICATIONS ALL NORMAL DURING CRUISE, POSSIBLE COMPRESSOR STALL. TROUBLESHOT IAW FIM 72-00-00-810-817. R & R RT ENGINE 9TH STAGE VALVE IAW NRWC 931-SGF-01852. ACCOMPLISHED HIGH POWER RUNS, NO DEFECTS NOTED IAW RR MM 72-00-00-790-002.