What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Narrative: after takeoff and during climb pilot visually identified oil spewing from right engine cowling. Pilot verified right engine oil pressure and temperature indications as normal pilot shut down and secured right engine and executed a single engine approach and landing without further incident. Post flight revealed that the right engine oil cap was not secure. It was determined that approximately 2 1/2 quarts of oil were lost during flight. The Lycoming TIO-540-F2BD engine contains a maximum oil capacity of 12 quarts, with a minimum safe oil quantity of 2 3/4 quarts. No engine damage was evident. The pilot determined that he did not properly secure the right engine oil cap during preflight inspection.
As the FAA filed it
NARRATIVE: AFTER TAKEOFF AND DURING CLIMB PILOT VISUALLY IDENTIFIED OIL SPEWING FROM RIGHT ENGINE COWLING. PILOT VERIFIED RIGHT ENGINE OIL PRESSURE AND TEMPERATURE INDICATIONS AS NORMAL PILOT SHUT DOWN AND SECURED RIGHT ENGINE AND EXECUTED A SINGLE ENGINE APPROACH AND LANDING WITHOUT FURTHER INCIDENT. POST FLIGHT REVEALED THAT THE RIGHT ENGINE OIL CAP WAS NOT SECURE. IT WAS DETERMINED THAT APPROXIMATELY 2 1/2 QUARTS OF OIL WERE LOST DURING FLIGHT. THE LYCOMING TIO-540-F2BD ENGINE CONTAINS A MAXIMUM OIL CAPACITY OF 12 QUARTS, WITH A MINIMUM SAFE OIL QUANTITY OF 2 3/4 QUARTS. NO ENGINE DAMAGE WAS EVIDENT. THE PILOT DETERMINED THAT HE DID NOT PROPERLY SECURE THE RIGHT ENGINE OIL CAP DURING PREFLIGHT INSPECTION.