As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON LEFT ENGINE PYLON INBOARD SIDE SKIN, ON INTERIOR, AT APPROXIMATELY POWERPLANT WATER LINE 140.94 POWERPLANT STATION 144.425 TO 170 - ACCOMPLISHED CORROSION BLEND OUT REPAIR TO LEFT ENGINE PYLON SKIN IN ACCORDANCE WITH BOEING SERVICE REQUEST SR 3-4547117692 INSTRUCTIONS.