NTSB Identification: MKC87FA083.
The docket is stored on NTSB microfiche number 35236.
Accident occurred Sunday, April 19, 1987 in STILLWELL, KS
Probable Cause Approval Date: 05/16/1989
Aircraft: AERONCA 11AC, registration: N85846
Injuries: 2 Serious.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE PILOT STATED THAT THIS FLIGHT WAS TO BE A PHOTOGRAPHIC, PLEASURE TRIP INVOLVING TWO AIRCRAFT. AFTER SEVERAL AERIAL PHOTOS WERE TAKEN OF EACH OTHER'S AIRCRAFT, BOTH AIRPLANES LANDED AT THE ACCIDENT AIRPORT. THE PIC AND HIS PASSENGER THEN TOOK-OFF WHILE THE OTHER AIRCRAFT STAYED ON THE GROUND IN ORDER FOR ITS CREW TO PHOTOGRAPH THE AIRBORNE AIRCRAFT. ACCORDING TO THE PIC, HE MADE SEVERAL LOW PASSES OVER THE AERODROME WHEN, SUDDENLY, WIND SHEAR CAUSED THE AIRCRAFT TO WEATHERCOCK AND STALL FROM APPROX 40 FT AGL, PRECLUDING ANY STALL RECOVERY BEFORE IMPACT. ACCORDING TO THE NATIONAL WEATHER SERVICE, WINDS IN THE AREA AT THE TIME OF THE ACCIDENT WERE FROM THE SOUTHEAST AT 16 KTS, GUSTING TO 25 KTS. AIRPORT PERSONNEL REPORTED THAT TREES HAD BEEN PLANTED RECENTLY--BY NEIGHBORS--IN THE IMMEDIATE PERIMETER OF THE AIRSTRIP.

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

COMPENSATION FOR WIND CONDITIONS..INADEQUATE..PILOT IN COMMAND

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

AIRSPEED..NOT MAINTAINED..PILOT IN COMMAND

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

STALL..INADVERTENT..PILOT IN COMMAND


Contributing Factors

IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND


Contributing Factors

COMPLACENCY..PILOT IN COMMAND


Contributing Factors

WIND INFORMATION..DISREGARDED..PILOT IN COMMAND


Contributing Factors

LOW PASS..ATTEMPTED..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..UNFAVORABLE WIND


Contributing Factors

WEATHER CONDITION..GUSTS

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