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B74S, Stockholm Arlanda Sweden, 1996
From SKYbrary Wiki
On 14 June 1996, a Boeing 747SP being operated by Air China on a scheduled passenger flight from Beijing to Stockholm was arriving on the designated parking gate at destination in normal daylight visibility when it collided with the airbridge. None of the 130 occupants of the aircraft suffered any injury but the aircraft was “substantially damaged” and the airbridge was “damaged”.
An Investigation was carried out by the Swedish Accident Investigation Board. It established that the aircraft had continued towards the designated parking position for the longer 747 variants which was 12 metres beyond the correct position for the shorter 747SP which has only one passenger door forward of the wing. It also established that:
- There had been no malfunction in the docking bridge or in the docking system.
- The handling agent had programmed the wrong aircraft version when setting the airbridge position
- The Captain had not noticed that the wrong aircraft version was displayed on the head-of-gate information display
- Neither the Handling Agent nor the Technician in attendance had pressed the emergency stop button upon realizing that the a collision was imminent.
- The Captain had increased engine thrust in an attempt to continue taxiing after the initial collision between the left engine and the airbridge and the initial damage was thus made worse.
- The safety system of the Docking Guidance System could not distinguish between the different versions of the same aircraft type.