As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AFTER ARRIVAL INTO DFW IT WAS DISCOVERED THAT THE LEFT ENGINE OIL SERVICE PANEL WAS MISSING AND HAD DEPARTED THE AIRCRAFT RESULTING IN DAMAGE TO THE LEFT HAND OUTBOARD FAN COWL. MAINTENANCE REPLACED THE FAN COWL ASSEMBLY PER TASK CARD 26L00071006.