What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23)Cessna 172 departed dpa to pea. Approximately 10 miles from the Pella, IA airport the aircraft engine starting running rough and then lost all power. The pilot made an off-airport landing in a soybean field without substantial damage to the aircraft. Further inspection of the aircraft engine showed that the number 4 cylinder exhaust valve was missing and the number 4 piston appeared to be broken.
As the FAA filed it
(-23)CESSNA 172 DEPARTED DPA TO PEA. APPROXIMATELY 10 MILES FROM THE PELLA, IA AIRPORT THE AIRCRAFT ENGINE STARTING RUNNING ROUGH AND THEN LOST ALL POWER. THE PILOT MADE AN OFF-AIRPORT LANDING IN A SOYBEAN FIELD WITHOUT SUBSTANTIAL DAMAGE TO THE AIRCRAFT. FURTHER INSPECTION OF THE AIRCRAFT ENGINE SHOWED THAT THE NUMBER 4 CYLINDER EXHAUST VALVE WAS MISSING AND THE NUMBER 4 PISTON APPEARED TO BE BROKEN.