NTSB Identification: CHI90DER05.
The docket is stored on NTSB microfiche number 42108.
Accident occurred Sunday, August 05, 1990 in ULEN, MN
Probable Cause Approval Date: 09/21/1992
Aircraft: PIPER PA-25-235, registration: N82521
Injuries: 1 Serious.

THE PILOT STATED THAT THE PURPOSE OF THE FLIGHT WAS TO OBSERVE CROP DEVELOPMENT. THE FLIGHT WAS CONDUCTED AT A LOW ALTITUDE. ALTHOUGH THE PILOT DOES NOT RECALL THE EXACT REASON FOR LOSS OF CONTROL OF THE AIRCRAFT, THE LAST THING HE REMEMBERS WAS MAKING A LEFT TURN. A WITNESS SAW THE AIRCRAFT DESCENDING WING AND NOSE DOWN INTO THE TERRAIN. THE AIRCRAFT WAS SUBSTANTIALLY DAMAGED AND THE PILOT SUSTAINED SERIOUS INJURIES. SUBSEQUENT INVESTIGATION REVEALED NOTHING OF A MECHANICAL NATURE THAT WOULD HAVE HAD A NEGATIVE IMPACT ON THE FLIGHT.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN CONTROL OF THE AIRCRAFT TO AVOID THE INADVERTENT ENTRY INTO A STALL/SPIN AT LOW ALTITUDE WHICH RESULTED IN IMPACT WITH THE TERRAIN.

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