As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AIRCRAFT DIVERTED TO OMA ACCOUNT OIL QUANTITY PRESSURE ISSUE. OIL QUANTITY READS 5 IN FLIGHT FOR NUMBER 1 ENGINE. FLIGHT DID NOT DECLARE AN EMERGENCY AND DID NOT LAND OVERWEIGHT. REMOVED AND REPLACED NUMBER 1 ENGINE LUBRICATION UNIT PER A/C MM 79-21-01