As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERSION & INFLIGHT SHUTDOWN. DECLARED EMER INFLIGHT, AT FL 330 CRUISE NOTICED AN AIRFRAME VIBRATION WITH NO INCREASE IN ENG VIBRATION GAUGES. SMALL COMPRESSOR STALL POP & LT ENG ROLLED BACK TO 50% N2 HAD MOMENTARY SMELL OF SMOKE VIBRATION, CONTINUED WITH LT THRUST LEVER AT IDLE LT ENG SECURED. R & R NR 1 ENG IAW MT.