Accident de Havilland Canada DHC-6 Twin Otter 200 N956SM, Monday 9 November 1970
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Date:Monday 9 November 1970
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different    
de Havilland Canada DHC-6 Twin Otter 200
Owner/operator:Mississippi Valley Airlines - MVA
Registration: N956SM
MSN: 203
Year of manufacture:1969
Engine model:Pratt & Whitney Canada PT6A-20
Fatalities:Fatalities: 0 / Occupants: 6
Other fatalities:0
Aircraft damage: Destroyed, written off
Location:La Crosse Municipal Airport, WI (LSE) -   United States of America
Phase: Approach
Nature:Passenger - Scheduled
Departure airport:Minneapolis-St. Paul International Airport, MN (MSP/KMSP)
Destination airport:La Crosse Municipal Airport, WI (LSE/KLSE)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Mississippi Valley Airlines Flight 106 departed Minneapolis at 15:25 for a flight to Winona Municipal Airport, MN (ONA) and climbed to its assigned cruising altitude of 5000 feet. Shortly after departure the flight was advised that weather at the destination was below minima. Minneapolis ARTCC then cleared the crew to La Crosse. Weather at La Crosse was reported being indefinite ceiling, 500 feet obscuration, visibility half a mile, light drizzle and fog. Shortly after 4 pm the flight passed the Holman Intersection at 3000 feet msl, descending to the Midway final approach fix which was crossed at 2100 feet. The pilot leveled the plane at 1100 feet. Shortly thereafter, the plane struck trees. Both wings, the engines, the left main landing gear, strut an left horizontal stabilizer separated from the aircraft.

PROBABLE CAUSE: "For reasons unknown, the captain failed to maintain altitude at minimum descent altitude and allowed the aircraft to descend below the height of the trees while executing a nonprecision instrument approach in instrument flight conditions."

Accident investigation:
Investigating agency: NTSB
Report number: CHI71AC031
Status: Investigation completed
Duration: 5 months
Download report: Final report




Revision history:


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