As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CDG - DURING CRUISE, NR 1 ENGINE SURGED AT CONSTANT THRUST. ENGINE PARAMETERS WERE NORMAL AFTER THE SURGE. CHECKED ENGINE INLET, EXHAUST, 3.5 BLEED VALVE SCREENS AND OIL MAGNETIC CHIP DETECTORS. ALL CHECKS WERE NORMAL. ADJUSTED ENGINE VANE BLEED CONTROL.