As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. NR 1 ENG STALLED AT FL 350. NOISE & VIBRATION FELT & POWER REDUCED ON ITS OWN TO APPROX 50%. POWER WAS REDUCED TO IDLE & ENG IDLED NORMALLY. ENG SURGED & STALLED TWICE BEFORE POWER WAS BROUGHT TO IDLE. FLIGHT CREW DECLARED AN EMER, LANDED SAFELY & TAXIED TO THE GATE. REPLACED THE LT ENG IAW TASK CARD 26L40071001.