What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) At cruise altitude (14000') during flight from cwa to msp, left engine oil low pressure warning illuminated. Oil pressure was below 30 PSI (red line). Crew utilized qrh checklist and secured left engine. Aircraft diverted to eau, during post flight, crew noticed oil on right side of left engine cowl. Maintenance found loose 'b' nut on b sump differential oil line. Engine was changed p/n OFF-CT7-9B, s/n OFF-GE-E785691 t.t. engine-20,120 hrs, TSO engine-1539 hours.
As the FAA filed it
(-23) AT CRUISE ALTITUDE (14000') DURING FLIGHT FROM CWA TO MSP, LEFT ENGINE OIL LOW PRESSURE WARNING ILLUMINATED. OIL PRESSURE WAS BELOW 30 PSI (RED LINE). CREW UTILIZED QRH CHECKLIST AND SECURED LEFT ENGINE. AIRCRAFT DIVERTED TO EAU, DURING POST FLIGHT, CREW NOTICED OIL ON RIGHT SIDE OF LEFT ENGINE COWL. MAINTENANCE FOUND LOOSE 'B' NUT ON B SUMP DIFFERENTIAL OIL LINE. ENGINE WAS CHANGED P/N OFF-CT7-9B, S/N OFF-GE-E785691 T.T. ENGINE-20,120 HRS, TSO ENGINE-1539 HOURS.