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No engine defect on crash plane No engine defect on crash plane
(about 1 hour later)
The engines of a jet that crash-landed at Heathrow Airport had no mechanical defects, investigators have said.The engines of a jet that crash-landed at Heathrow Airport had no mechanical defects, investigators have said.
The special bulletin from the Air Accidents Investigation Branch (AAIB) added the engines of the Boeing 777 plane had not ingested birds or ice. The Air Accidents Investigation Branch (AAIB) added the black box data recorder showed nothing wrong with the major aircraft systems.
Last month the AAIB said the engines on the British Airways jet were running when it came down on 17 January. But there was some damage to the fuel pumps and some small items of debris were found in the fuel tanks.
All 136 passengers and 16 crew on the flight from Beijing survived the incident. All 136 passengers and 16 crew on the British Airways flight from Beijing survived the incident on 17 January.
The AAIB said investigations were now "under way to attempt to replicate the damage seen to the engine high pressure fuel pumps and to match this to the data recorded on the accident flight". Not giving any cause of the accident, the AAIB said it was carrying out a full examination and analysis of the entire Boeing 777 aircraft and engine fuel system.
Plane skidded Escaped fuel
The AAIB also said that a comprehensive examination and analysis was to be conducted on the entire aircraft and engine fuel system. It added it had ruled out ice, water and bird ingestion into the engines or contamination of fuel tanks.
With the cockpit crew unable to get the required thrust from the engines as the plane approached Heathrow, the aircraft had come down on the grass "some 1,000ft short of the paved runway surface and just inside the airfield boundary fence", the report on Monday said.With the cockpit crew unable to get the required thrust from the engines as the plane approached Heathrow, the aircraft had come down on the grass "some 1,000ft short of the paved runway surface and just inside the airfield boundary fence", the report on Monday said.
As the plane skidded across the grass and on to the end of the runway, the underside of the aircraft collapsed.As the plane skidded across the grass and on to the end of the runway, the underside of the aircraft collapsed.
All occupants were safely evacuated, with one passenger suffering a broken leg and eight others receiving minor injuries. The report said a significant amount of fuel had escaped the aircraft on landing but had not caught fire.
Four crew were slightly hurt. Safety recommendation
All occupants were safely evacuated, with one passenger suffering a broken leg and eight others receiving minor injuries. Four crew were slightly hurt.
The AAIB did make one safety recommendation. This concerned the order in which the cockpit crew went through the evacuation checklist procedures.
Boeing raised no technical objection to BA introducing a save-time checklist sequence, but the report said this led to the loss of fuel from the aircraft.
The AAIB added: "This was not causal to the accident but could have had serious consequences in the event of a fire during the evacuation."
The AAIB recommended that Boeing tell 777 operators to do the evacuation checklist in the right order. Boeing had accepted this.