What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-5) N33679, a Piper 28-180, departed mcpherson, Kansas with pilot and one passenger and proceeded for a flight to sublett, Kansas. During cruise at 4500', engine RPM dropped from 2500 to 1800 and aircraft began to descend. Pilot performed a forced landing in a field one mile west of st. John, Kansas. During approach, the left aileron lower trailing edge struck the top of a fence post causing minor damage. The aircraft landed safely with no further damage and no injuries. During investigation it was discovered the no.1 cylinder exhaust valve had failed.
As the FAA filed it
(-5) N33679, A PIPER 28-180, DEPARTED MCPHERSON, KANSAS WITH PILOT AND ONE PASSENGER AND PROCEEDED FOR A FLIGHT TO SUBLETT, KANSAS. DURING CRUISE AT 4500', ENGINE RPM DROPPED FROM 2500 TO 1800 AND AIRCRAFT BEGAN TO DESCEND. PILOT PERFORMED A FORCED LANDING IN A FIELD ONE MILE WEST OF ST.JOHN, KANSAS. DURING APPROACH, THE LEFT AILERON LOWER TRAILING EDGE STRUCK THE TOP OF A FENCE POST CAUSING MINOR DAMAGE. THE AIRCRAFT LANDED SAFELY WITH NO FURTHER DAMAGE AND NO INJURIES. DURING INVESTIGATION IT WAS DISCOVERED THE NO.1 CYLINDER EXHAUST VALVE HAD FAILED.