As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT, PASSING FL 290 FELT 2 FIRM JOLTS WITH YAW TO THE LT ENG INDICATIONS NORMAL IN COCKPIT. FELT LIKE COMPRESSOR STALL ON NR 1 ENG. ENG RPM'S AT THE TIME WERE ATS CET 101 PERCENT. REMOVED AND REPLACED NR 3 ENG. LEAK AND OPS CHECKED GOOD. ACFT OK FOR FLIGHT.