What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The aircraft was being operated FAR part 137, aerial application, when the pilot experienced a fluctuation in the engine torque. The engine performance deteriorated as the pilot elected to land the aircraft on a hard surfaced, rural road in the immediate area of the application process. As the aircraft was attempted to be landed on a rural road in a northerly direction, the left wing contacted a standing corn crop that prevented the accomplishment of a controlled landing. The aircraft came to rest on the left side of the road experiencing substantial damage to the wings and right fuselage. As the aircraft was recovered from the accident site, it was noted that the engine oil filler cap was not installed in the engine. The missing oil filler cap had permitted oil loss from the engine leading to loss of propeller control that resulted in engine the torque fluctuation and loss of power.
As the FAA filed it
(-23) THE AIRCRAFT WAS BEING OPERATED FAR PART 137, AERIAL APPLICATION, WHEN THE PILOT EXPERIENCED A FLUCTUATION IN THE ENGINE TORQUE. THE ENGINE PERFORMANCE DETERIORATED AS THE PILOT ELECTED TO LAND THE AIRCRAFT ON A HARD SURFACED, RURAL ROAD IN THE IMMEDIATE AREA OF THE APPLICATION PROCESS. AS THE AIRCRAFT WAS ATTEMPTED TO BE LANDED ON A RURAL ROAD IN A NORTHERLY DIRECTION, THE LEFT WING CONTACTED A STANDING CORN CROP THAT PREVENTED THE ACCOMPLISHMENT OF A CONTROLLED LANDING. THE AIRCRAFT CAME TO REST ON THE LEFT SIDE OF THE ROAD EXPERIENCING SUBSTANTIAL DAMAGE TO THE WINGS AND RIGHT FUSELAGE. AS THE AIRCRAFT WAS RECOVERED FROM THE ACCIDENT SITE, IT WAS NOTED THAT THE ENGINE OIL FILLER CAP WAS NOT INSTALLED IN THE ENGINE. THE MISSING OIL FILLER CAP HAD PERMITTED OIL LOSS FROM THE ENGINE LEADING TO LOSS OF PROPELLER CONTROL THAT RESULTED IN ENGINE THE TORQUE FLUCTUATION AND LOSS OF POWER.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.
Other reports on N9892 · 1
Matched to the same aircraft by N-number and date.