NTSB Identification: DEN88LA067.
The docket is stored on NTSB microfiche number 35551.
Accident occurred Wednesday, February 10, 1988 in ROUNDUP, MT
Probable Cause Approval Date: 03/30/1989
Aircraft: CESSNA 180, registration: N7661A
Injuries: 1 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
THE PRIVATE PLT RANCHER WAS COMPLETING A WORK FLT. DURING THE FLT, THE PLT MADE 5 OFF ARPT LANDINGS IN SNOW 5 TO 6 INCHES DEEP. THE LANDING ON WHICH THE ACCIDENT OCCURRED WAS MADE AT A LOCAL ARPT ON A SNOW COVERED RWY. DURING THE LANDING, THE ACFT SANK INTO DEEP SNOW AND NOSED OVER. AFTER THE ACCIDENT, THE DEPTH OF THE SNOW ON THE RWY WAS DETERMINED TO BE APRX 12 INCHES. NO NOTAMS PERTAINING TO SNOW ON THE RWY WERE ISSUED PRIOR TO THE ACCIDENT BUT A NOTAM WAS ISSUED AFTER THE ACCIDENT.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:IN-FLIGHT PLANNING/DECISION..INADEQUATE..PILOT IN COMMAND
The National Transportation Safety Board determines the probable cause(s) of this accident to be:UNSUITABLE TERRAIN OR TAKEOFF/LANDING/TAXI AREA..SELECTED..PILOT IN COMMAND
TERRAIN CONDITION..SNOW COVERED
AIRPORT SNOW REMOVAL..NOT PERFORMED..AIRPORT PERSONNEL
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