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| Title: | Jammed aileron, Incident involving aircraft SE-DRG, 13 January 1997, in controlled airspace west of Stockholm, AB county, Sweden |
| Micro summary: | A loose plate caused a jammed aileron and difficulties in controlling this BAe 146-200 . |
| Event Time: | 1997-01-13 at 1600 |
| File Name: | 1997-01-13-SE.pdf |
| Publishing Agency: | Swedish Accident Investigation Board (AIB) |
| Publishing Country: | Sweden |
| Report number: | C 1997:49 |
| Pages: | 14 |
| Diversion Airport: | Norrköping/Kungsängen, Sweden |
| Site of event: | In controlled airspace west of Stockholm, AB county, after takeoff at an altitude of around 1300 ft above ground |
| Departure: | Stockholm/Bromma Airport, Stockholm, Sweden |
| Destination: | Kungsängen Airport, Norrköping, Sweden |
| Airplane Type(s): | BAe 146-200 |
| Flight Phase: | Climb |
| Registration(s): | SE-DRG |
| Operator(s): | Malmö Aviation Schedule AB |
| Type of flight: | Revenue |
| Occupants: | 43 |
| Fatalities: | 0 |
| Serious Injuries: | 0 |
| Minor/Non-Injured: | 43 |
| Other Injuries: | 0 |
| Diverted to: | Norrköping/Kungsängen, Sweden |
| Executive Summary: | The aircraft took off from Stockholm/Bromma airport 13 January 1997 at 1706 hrs. When the copilot, at an altitude of approximately 1 300 ft above ground and in a left turn, intended to straighten out, he could not move the wheel more than 10 to 20 degrees right from its neutral position. The jamming was confirmed by the captain who by turning the left wheel with considerable force disconnected the left aileron control system from the right system. The captain was then able to manoeuvre the aircraft from his left seat using large wheel inputs. The crew declared an emergency and decided finally to divert to Norrköping/Kungsängen. The landing there was uneventful and the passengers disembarked at the terminal building. The probable cause of the incident was a loose cover plate on the right aileron which, under the influence of aerodynamic forces during flight could catch against the trailing edge of the wing skin thereby jamming the upward movement of the aileron. In its Preliminary Report dated 31 January 1997 the Board has recommended the Swedish Civil Aviation Authority to encourage their British counterpart, initially, to direct all operators of the aircraft type to perform a special check of the chain tension in the control column and of the installation of the cover plate. |
| Learning Keywords: | Systems - Flight Control System |
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