Narrative:While descending for landing at Baton Rouge, the captain actively moved the power levers from the flight idle gate into the beta range for undetermined reasons. The propellers and engines experienced extreme overspeed, necessitating a power-off emergency landing at night and the airplane ran off the end of a 5,000-ft runway. Although the design and certification of the power levers met existing requirements, those requirements were inadequate because they permitted a design that did not prevent movement into the beta range in flight.
Probable Cause:PROBABLE CAUSE: "The captain’s movement of the power levers below flight idle in flight, the inadequate certification requirements and consequent design of the airplane’s power levers that permitted them to be moved below the flight idle position into the beta range, either intentionally or inadvertently, while in flight, and the inadequate action taken to require a positive means to prevent beta operation on airplanes for which such operation is prohibited."
|investigating agency: ||National Transport Safety Bureau (NTSB) - United States of America |
|released:||27 September 1994|
|duration: ||238 days (8 months)|
|download report: ||
» Air Safety Week 03 October 1994 (p. 1-2)
» Aviation Week & Space Technology 7.3.94 (29/30)
» Flight International
» NTSB Safety Recommendations A-94-61 through -63
» Scramble 181
Follow-up / safety actions
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not
display the exact flight path.
Distance from Dallas/Fort Worth International Airport, TX to Baton Rouge-Ryan Airport, LA as the crow flies is 612 km (382 miles).