What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) N7521A, DC-9-82 (MD82), being operated as American airlines flight 1188 enroute denver, co to chicago, IL, diverted into Omaha, NE. Due to low oil quantity indication in the right engine. Contract maintenance found oil dripping from the #2 engine, and both oil temperature labels starting to turn black. The origin of the oil leak was not determined. The engine was changed.
As the FAA filed it
(-23) N7521A, DC-9-82 (MD82), BEING OPERATED AS AMERICAN AIRLINES FLIGHT 1188 ENROUTE DENVER, CO TO CHICAGO, IL, DIVERTED INTO OMAHA, NE. DUE TO LOW OIL QUANTITY INDICATION IN THE RIGHT ENGINE. CONTRACT MAINTENANCE FOUND OIL DRIPPING FROM THE #2 ENGINE, AND BOTH OIL TEMPERATURE LABELS STARTING TO TURN BLACK. THE ORIGIN OF THE OIL LEAK WAS NOT DETERMINED. THE ENGINE WAS CHANGED.