What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Baron N58GE BE-58 aircraft on a part 135 on demand flight enroute from greenville Michigan (6D6) to chicago midway (mdw) experienced vibrations from the left hand engine. The vibrations rapidly got more severe. The pilot secured the engine and feathered the propeller. He then elected to land at Gerald Ford airport, Grand Rapids, MI (grr). The aircraft landed without further incident. The aircraft was then towed to a repair station on the field for further evaluation.
As the FAA filed it
BARON N58GE BE-58 AIRCRAFT ON A PART 135 ON DEMAND FLIGHT ENROUTE FROM GREENVILLE MICHIGAN (6D6) TO CHICAGO MIDWAY (MDW) EXPERIENCED VIBRATIONS FROM THE LEFT HAND ENGINE. THE VIBRATIONS RAPIDLY GOT MORE SEVERE. THE PILOT SECURED THE ENGINE AND FEATHERED THE PROPELLER. HE THEN ELECTED TO LAND AT GERALD FORD AIRPORT, GRAND RAPIDS, MI (GRR). THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. THE AIRCRAFT WAS THEN TOWED TO A REPAIR STATION ON THE FIELD FOR FURTHER EVALUATION.