What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) This helicopter was participating in practice disaster drill with the national park service mt rushmore and pennington county sheriffs department. At level flight over mt rushmore 5500 feet the left engine failed. The flight crew verified the failure. An attempt at restart failed. The flight crew was returning to rapid city regional, but decided to complete a precautionary landing in a field 12 miles south and 5 miles west of highway 79 south of rapid city. Aircraft not damaged.
As the FAA filed it
(-23) THIS HELICOPTER WAS PARTICIPATING IN PRACTICE DISASTER DRILL WITH THE NATIONAL PARK SERVICE MT RUSHMORE AND PENNINGTON COUNTY SHERIFFS DEPARTMENT. AT LEVEL FLIGHT OVER MT RUSHMORE 5500 FEET THE LEFT ENGINE FAILED. THE FLIGHT CREW VERIFIED THE FAILURE. AN ATTEMPT AT RESTART FAILED. THE FLIGHT CREW WAS RETURNING TO RAPID CITY REGIONAL, BUT DECIDED TO COMPLETE A PRECAUTIONARY LANDING IN A FIELD 12 MILES SOUTH AND 5 MILES WEST OF HIGHWAY 79 SOUTH OF RAPID CITY. AIRCRAFT NOT DAMAGED.