Event Details

Title:Uncommanded yaw on rollout, Incident, Fokker F-27, D-AELF, Billund Airport
Micro summary:This airplane experienced an uncommanded yaw to the left on landing.
Event Time:2000-11-27 at 0322 UTC
File Name:2000-11-27-DK.pdf
Publishing Agency:Accident Investigation Board (AIB)
Publishing Country:Denmark
Report number:HCL 72/00
Site of event:Landing, Billund Airport
Destination:Billund Airport, Billund, Denmark
Airplane Type(s):Fokker F-27
Flight Phase:Landing
Operator(s):WDL Aviation
Type of flight:Revenue
Serious Injuries:0
Other Injuries:0
Executive Summary:The incident took place during the landing roll on runway 27. Having locked the gust locks the flight crew experienced that the aircraft started to turn to the left. It was not possible for the flight crew to stop the left turn either by using the nose wheel steering or using differential braking. The aircraft ran off the side of the runway between taxiway Charlie and taxiway Bravo with an indicated airspeed of approximately 30 knots.

There was no damage to the aircraft and the aircraft was able to taxi back to the runway by its own power and subsequently to the parking area.

Readout of the Flight Data Recorder (FDR) was done by the Bundesstelle für Flugunfalluntersuchung/BFU. The FDR itself was in a poor condition and the data quality was rather poor.

The FDR was declared unserviceable and sent back to the operator.

A technical investigation of the aircraft led to the following findings:

The no. 4 brake system was found unserviceable and the follow up control valve for the nose wheel steering did not work properly.

The incident took place at dark night and under visual meteorological conditions (VMC).
Learning Keywords:Operations - Braking Issues (General)
Operations - Runway Excursion
Operations - Upset - Uncommanded or excessive Yaw
Close match:Runway departure, Incident of aircraft, Airbus A-340 registration EC-IDF, at Madrid-Barajas Airport (Madrid) on 7 September 2002
Runway overrun, Continental Air Lines, Inc., McDonnell-Douglas DC-10-10, N68045, Los Angeles, California, March 1, 1978
Runway excursion during takeoff, Boeing 747-136, Jamaica, December 20, 1995
Runway excursion, McDonnell Douglas DC-9-82, Denver, May 28, 2005
Runway excursion, Boeing 737-223, Atlanta, November 1, 1998


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