What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The pilot was on a cross country flight from justin, TX. To des moines, Iowa. He stated that the engine lost oil pressure. He shut the engines down and made a forced landing. During the forced landing, the a/c hit a fence and flipped over. privacy data omitted (.4)While en route, following a decrease of oil pressure, the pilot shut down the engine. During the forced landing flare/touchdown in the field, the main landing gear struck a fence and the airplane nosed over. At the site, oil was found covering the lower surface of the airplane from the engine cowling to the empennage, and the oil cap was not found. The engine and aircraft manufacturers did not have any record where a secured oil cap came off in flight. The aircraft representative stated that if the 'tabs inside the filler cap became corroded completely through, they would not retain the cap properly.' A mechanic, who recovered the airplane from the field, stated that the oil cap was not found, and he noticed no discrepancies or rust on the oil filler neck. The manufacturer's preflight checklist states in part: 'check oil level.' The operating details states in part: 'in replacing the cap, make sure that it is on firmly and turned all the way to the stop at the right to prevent loss of oil through the filler neck.'
As the FAA filed it
(-23) THE PILOT WAS ON A CROSS COUNTRY FLIGHT FROM JUSTIN, TX. TO DES MOINES, IOWA. HE STATED THAT THE ENGINE LOST OIL PRESSURE. HE SHUT THE ENGINES DOWN AND MADE A FORCED LANDING. DURING THE FORCED LANDING, THE A/C HIT A FENCE AND FLIPPED OVER. ^PRIVACY DATA OMITTED^ (.4)WHILE EN ROUTE, FOLLOWING A DECREASE OF OIL PRESSURE, THE PILOT SHUT DOWN THE ENGINE. DURING THE FORCED LANDING FLARE/TOUCHDOWN IN THE FIELD, THE MAIN LANDING GEAR STRUCK A FENCE AND THE AIRPLANE NOSED OVER. AT THE SITE, OIL WAS FOUND COVERING THE LOWER SURFACE OF THE AIRPLANE FROM THE ENGINE COWLING TO THE EMPENNAGE, AND THE OIL CAP WAS NOT FOUND. THE ENGINE AND AIRCRAFT MANUFACTURERS DID NOT HAVE ANY RECORD WHERE A SECURED OIL CAP CAME OFF IN FLIGHT. THE AIRCRAFT REPRESENTATIVE STATED THAT IF THE 'TABS INSIDE THE FILLER CAP BECAME CORRODED COMPLETELY THROUGH, THEY WOULD NOT RETAIN THE CAP PROPERLY.' A MECHANIC, WHO RECOVERED THE AIRPLANE FROM THE FIELD, STATED THAT THE OIL CAP WAS NOT FOUND, AND HE NOTICED NO DISCREPANCIES OR RUST ON THE OIL FILLER NECK. THE MANUFACTURER'S PREFLIGHT CHECKLIST STATES IN PART: 'CHECK OIL LEVEL.' THE OPERATING DETAILS STATES IN PART: 'IN REPLACING THE CAP, MAKE SURE THAT IT IS ON FIRMLY AND TURNED ALL THE WAY TO THE STOP AT THE RIGHT TO PREVENT LOSS OF OIL THROUGH THE FILLER NECK.'
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.