As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERTED TO DFW FOR LEFT-HAND WING FUEL LOSS. PRELIMINARY INFORMATION, O-RING BLEW OUT OF THE FCOC (FUEL COOLED OIL COOLER) FILTER CARTRIDGE HOUSING. FAILED HELICOIL. CANNOT FIX HELICOIL. *S/D* FOUND FCOC LEAKING. REMOVED AND REPLACED SAME PER 79-21-43. OPS LEAK CHECKS OK.