What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Narrative: during descent into Hartsville the engine began to vibrate violently, then it stopped. The pilot landed the airplane in a soybean field 5.65 miles west of the airport. There were no injuries or damage to the aircraft. The oil cap was not on the engine. Engine oil was streaking along the left side of the aircraft. The pilot reported the oil cap came off once before and he purchased a new cap a year before the incident. The oil cap installed was retained by a chain attachaed to the oil filler neck. During investigations, it was determined that the oil cap did not have a positive lock after it was secured on the filler tube..
As the FAA filed it
NARRATIVE: DURING DESCENT INTO HARTSVILLE THE ENGINE BEGAN TO VIBRATE VIOLENTLY, THEN IT STOPPED. THE PILOT LANDED THE AIRPLANE IN A SOYBEAN FIELD 5.65 MILES WEST OF THE AIRPORT. THERE WERE NO INJURIES OR DAMAGE TO THE AIRCRAFT. THE OIL CAP WAS NOT ON THE ENGINE. ENGINE OIL WAS STREAKING ALONG THE LEFT SIDE OF THE AIRCRAFT. THE PILOT REPORTED THE OIL CAP CAME OFF ONCE BEFORE AND HE PURCHASED A NEW CAP A YEAR BEFORE THE INCIDENT. THE OIL CAP INSTALLED WAS RETAINED BY A CHAIN ATTACHAED TO THE OIL FILLER NECK. DURING INVESTIGATIONS, IT WAS DETERMINED THAT THE OIL CAP DID NOT HAVE A POSITIVE LOCK AFTER IT WAS SECURED ON THE FILLER TUBE..