As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFTER T/O DURING POWER REDUCTION FROM TOGA TO CLIMB, LEFT ENGINE SURGED 4 TIMES AND THEN RETURNED TO NORMAL. THE SURGE WAS AUDIBLE AND NOTED ON LEFT EPR. MAINTENANCE ACCOMPLISHED TSM 71-00-00-810-808-A AND TASK CARDS 26T00031001 & 26L40071022. NO SURGES OR NOISE NOTED DURING HIGH POWER ASSURANCE TEST AND ALL ENGINE PARAMETERS WERE NORMAL PER AMM 71-00-00-710-013-C.