Accident Curtiss C-46F-1-CU Commando N3971B, Friday 20 November 1964
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Date:Friday 20 November 1964
Type:Silhouette image of generic C46 model; specific model in this crash may look slightly different    
Curtiss C-46F-1-CU Commando
Owner/operator:Zantop Air Transport, lsf Aaxico Airlines
Registration: N3971B
MSN: 22594
Year of manufacture:1945
Total airframe hrs:25018 hours
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Destroyed, written off
Location:Detroit-Metropolitan Wayne County Airport, MI (DTW) -   United States of America
Phase: Initial climb
Departure airport:Detroit-Metropolitan Wayne County Airport, MI (DTW/KDTW)
Destination airport:
Investigating agency: NTSB
The Curtiss C-46 was loaded to about 20 pounds under the maximum allowable gross weight of 48000 pounds for the cargo flight to Wilmington. Weather was 2300 feet overcast, visibility 10 miles in light snow, temperature 26deg F. and wind 250deg at 4 knots. About 2-3 inches of snow were swept from the wings and the underlying layer of rough crusted ice was de-iced using an 8 to 1 mixture of ethyline glycol. At 06:08 the plane took off from runway 21L and climbed to 200 feet following a longer than usual takeoff run. When power was reduced, the plane started vibrating and altitude was lost. The aircraft contacted the ground again 2050 feet past the end of the runway and slid for 448 feet before coming to rest in an upright position. It appeared that a layer of about 3 mm ice was still on the wings.

PROBABLE CAUSE: "A loss of lift during takeoff, resulting from airframe icing caused by inadequate de-icing and pre-flight inspection."

Accident investigation:
Investigating agency: NTSB
Report number: UNK65X0768
Status: Investigation completed
Duration: 5 months
Download report: Final report




photo (c) Barry Sell; Detroit-Metropolitan Wayne County Airport, MI (DTW); November 1964

Revision history:


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