What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Aircraft took off and lost engine oil pressure, shut down, made an emergency landing short of runway. (.4)the airplane was on its first flight after an engine overhaul. Shortly after takeoff, the engine blew oil onto the pilot's windshield. The pilot shut down the engine and turned back toward the airport. The airplane was unable to make the runway and landed in a rough field. An engine teardown revealed that an incorrect crankshaft oil seal had been installed during the overhaul, and the seal had become dislodged during the flight. In addition, cranshaft and crankcase damage was found, and the damage was determined to be the result of misalignment of the crankcase halves during a previous modification.
As the FAA filed it
AIRCRAFT TOOK OFF AND LOST ENGINE OIL PRESSURE, SHUT DOWN, MADE AN EMERGENCY LANDING SHORT OF RUNWAY. (.4)THE AIRPLANE WAS ON ITS FIRST FLIGHT AFTER AN ENGINE OVERHAUL. SHORTLY AFTER TAKEOFF, THE ENGINE BLEW OIL ONTO THE PILOT'S WINDSHIELD. THE PILOT SHUT DOWN THE ENGINE AND TURNED BACK TOWARD THE AIRPORT. THE AIRPLANE WAS UNABLE TO MAKE THE RUNWAY AND LANDED IN A ROUGH FIELD. AN ENGINE TEARDOWN REVEALED THAT AN INCORRECT CRANKSHAFT OIL SEAL HAD BEEN INSTALLED DURING THE OVERHAUL, AND THE SEAL HAD BECOME DISLODGED DURING THE FLIGHT. IN ADDITION, CRANSHAFT AND CRANKCASE DAMAGE WAS FOUND, AND THE DAMAGE WAS DETERMINED TO BE THE RESULT OF MISALIGNMENT OF THE CRANKCASE HALVES DURING A PREVIOUS MODIFICATION.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.