What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The instructional flight was delayed leaving due to low IFR. After they met at the airplane and briefed, taxied to runway 17. The student picked up his clearance and had another delay for a king air departing. On departure the airplane climbed to 4000 feet. After being vectored away from the airport they were turned back for the approach and cleared down to 2200 feet. The instructor and student both noticed the engine was running a little rough and progressively got worse quickly. Within a minute of the first indication, they said they heard a "pop" followed by smoke coming out from beneath the engine cowling. As the airplane descended the instructor and student chose a road for their emergency landing. They missed all traffic on the road, mailboxes, roadsigns, trees and powerlines. After floating then rolling to a stop, the engine was still running even with one cylinder no longer mounted to the case. The rpms at this point had a wide variation. Engine shut off with mixture. After moving the airplane from the roadway calls were made to approach and 911.
As the FAA filed it
THE INSTRUCTIONAL FLIGHT WAS DELAYED LEAVING DUE TO LOW IFR. AFTER THEY MET AT THE AIRPLANE AND BRIEFED, TAXIED TO RUNWAY 17. THE STUDENT PICKED UP HIS CLEARANCE AND HAD ANOTHER DELAY FOR A KING AIR DEPARTING. ON DEPARTURE THE AIRPLANE CLIMBED TO 4000 FEET. AFTER BEING VECTORED AWAY FROM THE AIRPORT THEY WERE TURNED BACK FOR THE APPROACH AND CLEARED DOWN TO 2200 FEET. THE INSTRUCTOR AND STUDENT BOTH NOTICED THE ENGINE WAS RUNNING A LITTLE ROUGH AND PROGRESSIVELY GOT WORSE QUICKLY. WITHIN A MINUTE OF THE FIRST INDICATION, THEY SAID THEY HEARD A "POP" FOLLOWED BY SMOKE COMING OUT FROM BENEATH THE ENGINE COWLING. AS THE AIRPLANE DESCENDED THE INSTRUCTOR AND STUDENT CHOSE A ROAD FOR THEIR EMERGENCY LANDING. THEY MISSED ALL TRAFFIC ON THE ROAD, MAILBOXES, ROADSIGNS, TREES AND POWERLINES. AFTER FLOATING THEN ROLLING TO A STOP, THE ENGINE WAS STILL RUNNING EVEN WITH ONE CYLINDER NO LONGER MOUNTED TO THE CASE. THE RPMS AT THIS POINT HAD A WIDE VARIATION. ENGINE SHUT OFF WITH MIXTURE. AFTER MOVING THE AIRPLANE FROM THE ROADWAY CALLS WERE MADE TO APPROACH AND 911.