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One year on and investigators still have no answers to Boeing 777 incident
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View GalleryBy Murdo MacLeod
ACCIDENT investigators are still probing a previous incident involving a Boeing 777 at Heathrow, which took place almost a year before Thursday's crash-landing.
A team from the Air Accidents Investigation Branch (AAIB) is probing a fire in the electrical system of a United Airlines Boeing 777 which stopped the plane taking off last February.
The wreckage of flight BA038 is expected to be removed from the southern runway at Heathrow Airport this morning.
The British Airways Boeing 777 crash-landed after its engines failed on Thursday afternoon – with all 136 passengers and 16 crew escaping from the flight from Beijing.
Senior first officer John Coward, under the command of Captain Peter Burkill, averted disaster by landing the craft just within Heathrow's boundary fence following the malfunction.
In last year's incident, the flight-deck instrument displays flickered, and the crew heard an "abnormal noise" and smelled electrical burning. Smoke was seen to be coming out of the aircraft.
When investigators checked the plane, they found evidence of heat damage and fire in the electrical system of the aircraft.
In an interim report published in April, the investigators said that they needed to continue their probe in order to study how the fire spread. Their probe is ongoing.
Iain Findlay, an aviation consultant, said: "This could be significant, although it's very early to say one way or the other. The fact is that the Boeing 777 has a very good safety record."
A spokesman for the Civil Aviation Authority said that airlines would not ground all their 777s unless it became clear that the fault which caused the crash-landing on Thursday might be present in other planes.
An Air France source said that their experts were studying the information coming from the Heathrow probe, but that it was too early to say whether their 777s would be grounded. Air France operates more than 40 of the aircraft.
Crash investigators are due to move the 209ft, 142,900kg plane today and continue their research into the incident from the eastern BA hangars at Heathrow Airport.
The AAIB's preliminary report into Thursday's incident – which left 18 of the 136 passengers needing treatment, including one with a broken leg – is due out in 30 days.
The body said its investigation was now focused on "more detailed analysis of the flight-recorder information, collecting further recorded information from various system modules and examining the range of aircraft systems that could influence engine operation".
The decision to move the plane followed a day of normal services at Heathrow, with the British Airports Authority reporting a "modest" 38 cancellations.
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