As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: #1 ENGINE OIL QUANTITY WENT TO 2.5. ALL OTHER PARAMETERS NORMAL. THEN DROPPED TO 2.0 AND SLOWLY LOST OIL PRESSURE. WENT TO 68 PSI AIRCRAFT DIVERTED TO DFW. KEPT ENGINE RUNNING ALL PARAMETERS EXCEPT OIL QUANTITY AND PRESSURE STAYED NORMAL THROUGHOUT. NO EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED SAFELY AT DFW WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE FUEL COOLED OIL COOLER PER TASK CARD 26L40079001.