Event Details

Title:Failure to become airborne, Incident, Boeing 767-383, OY-KDN
Micro summary:Following rotation, this Boeing 767 failed to become airborne.
Event Time:1999-08-24 at 1403 UTC
File Name:1999-08-24-DK.pdf
Publishing Agency:Accident Investigation Board (AIB)
Publishing Country:Denmark
Report number:HCL 49/99
Diversion Airport:Copenhagen Airport (Kastrup), Copenhagen, Denmark
Site of event:Copenhagen Airport Kastrup (EKCH)
Departure:Copenhagen Airport (Kastrup), Copenhagen, Denmark
Destination:Narita International Airport, Tokyo, Japan
Airplane Type(s):Boeing 767-383
Flight Phase:Takeoff
Type of flight:Revenue
Serious Injuries:0
Other Injuries:0
Diverted to:Copenhagen Airport (Kastrup), Copenhagen, Denmark
Executive Summary:During take-off on runway 22R, the flight crew initiated the rotation. The nose wheel was lifted off the runway, but the aircraft main wheel remained on the runway. The commander took over the control of the aircraft, lowered the aircraft nose and aborted the take-off.

After the aircraft reached taxi speed near the end of runway 22R, the aircraft taxied into the taxiway AK. The aircraft was parked on taxiway AK and the Fire & Rescue Brigade was alerted in case of a brake fire and in order to cool down the brakes. The passengers were disembarked via the normal doors and were afterwards transported to the terminal.

The investigation revealed the following causal factors:

The flight crew used a wrong and too low value as input take-off weight (ACT TOW). The result was that the values for V1, Vr and V2 were too low. The aircraft was rotated at the wrong and too low Vr and the aircraft never got airborne.

Three safety recommendations were made during the course of the investigation.
Learning Keywords:Operations - Rejected Takeoff after V1
Operations - Takeoff or Landing Speed Calculations
Systems - Automation Design


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