Accident McDonnell Douglas DC-9-15 N974Z, Friday 27 December 1968

Date:	Friday 27 December 1968
Time:	07:11
Type:	McDonnell Douglas DC-9-15
Owner/operator:	Ozark Air Lines
Registration:	N974Z
MSN:	47034/162
Year of manufacture:	1967
Total airframe hrs:	3458 hours
Engine model:	Pratt & Whitney JT8D-7
Fatalities:	Fatalities: 0 / Occupants: 68
Other fatalities:	0
Aircraft damage:	Destroyed, written off
Category:	Accident
Location:	0,3 km N of Sioux City-Municipal Airport, IA (SUX) - United States of America
Phase:	Initial climb
Nature:	Passenger - Scheduled
Departure airport:	Sioux City-Municipal Airport, IA (SUX/KSUX)
Destination airport:	Chicago-O'Hare International Airport, IL (ORD/KORD)
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
Weather at Sioux City was poor: 800 feet overcast, 3 miles visibility in fog and light freezing drizzle.
Flight 982 took off from runway 35 and, upon gear retraction, rolled violently 90° to the right. The roll was counteracted, but the left wing struck the runway. The DC-9 crashed and came to rest in a grove of trees, 1181 feet past the runway end.

PROBABLE CAUSE: "A stall near the upper limits of ground effect, with subsequent loss of control as a result of aerodynamic and weight penalties of airfoil icing. The flight crew failed to have the airfoil ice removed prior to the attempted take-off from Sioux City. The Board also finds that the crew selected an improper takeoff thrust for the existing gross weight condition of the aircraft."

Accident investigation: