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Magazine Stories September Issue 2009
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Friday, 13 February 2009
IN the weeks after Air France flight 447 crashed into the Atlantic on a flight from Rio to Paris, France, some 51 bodies and more than 600 pieces of debris, passengers’ personal effects and luggage were recovered from the sea, Jack Handley writes.
Early reports said many of the 51 bodies recovered from the sea were naked, with their clothes stripped from their bodies by the force of the wind as they fell from around 35,000 feet. Many of them had suffered bone fractures consistent with a long fall. Some showed signs of asphyxia. None had drowned and none had burns, indicating there was no in-flight explosion.
Many of these assumptions were later overturned by the initial investigators’ report, which said that the plane hit the water belly-first and broke up on contact. The report also said recovered bodies (it did not say all) were fully-clothed.
This scenario, which for now is the best information available, still does not explain why the pilots were unable to make even a partial mayday call or why the bodies recovered from the sea were dispersed over such a wide area.
From now on, short of a miracle, the drama will play out in engineering sheds and hangars where experts will pore over the recovered wreckage, seeking clues to the cause of the disaster.
The world’s fourth biggest reinsurer, Hannover Re, says a preliminary damages claim total for the crash could be around US$35 million, depending on the “causes of the crash”.
While the causes are widely tipped to be an initial failure of wind speed sensors - Pitot tubes - that led to a failure of multiple systems and finally, the aircraft breaking up in mid air, there still are other unanswered questions.
These include:
- The pilot of a Brazilian TAM aircraft that took off soon after the missing Air France aircraft reported “orange coloured spots on the ocean”. The pilot “saw glowing spots on the sea on its path between Europe and Brazil, about 1,300 km off the island Fernandode Noronha”, TAM said.
And an Air Comet pilot who was flying behind the Air France jet on the same route said: “Suddenly we saw in the distance a strong, intense flash of white light that took a downward, vertical trajectory and disappeared in six seconds.”
- The Air France pilot sent a manual signal at 11pm local time saying he was flying through an area of CBs - electrically charged clouds that come with violent winds and lightning with thunderheads sending 100 mph updraft winds into the jet’s flight path.
However, those claims were immediately challenged by the Weather Channel. Though there were storms, they were almost certainly less intense than those sometimes encountered above the United States and any lightning was at least 150 miles away, according to Greg Forbes, the severe-weather expert for the Weather Channel. Forbes said an examination of weather data including satellite images indicated updrafts of perhaps 20 mph, far from the initial reports of 100 mph.
“I wouldn’t expect it to be enough to break apart the plane,” Forbes said.
- Air France’s chief executive said mid June he was not convinced faulty speed monitors caused the crash and the Christian Science Monitor (CSM) has suggested composite materials used in the jet’s construction may need closer inspection. In particular, CSM focused on portions of the tailpiece and stabiliser assembly recovered from the sea.
The condition of the tail piece indicated it had fallen loose from the plane and had not been subjected to a violent impact as part of a fuselage crash into the ocean, CSM said. Boeing and Airbus now both are using composites - in the Boeing 787 and the A350 - although aviation officials say that much remains to be learned about how composites degrade over time. Earlier this month the FAA issued a draft Advisory Circular aimed at changing the certification rules for composite aircraft. In the document, the FAA noted that the “nature of composites can make the determination of critical structural failure loads, modes and locations difficult.”
Was there a structural weakness that puts other similarly-constructed aircraft at risk? In the weeks following the Air France crash, two incidents involving Airbus (by Brazil’s TAM and USA’s Northwest) were reported.
- The Times newspaper says Air France’s management have acknowledged a series of faulty speed incidents on Airbuses beginning last August.
However, Eurocockpit.com, a web site run by professional pilots, claims that there have been 36 serious examples of faulty speed readings on A330s and A340s. In the first 35 of the incidents, pilots were able to recover control of the aircraft. AF447 was the 36th.
Eurocockpit also alleges Air France and Airbus knew of problems with speed-measuring equipment well before August 2008. Its claim conflicts with public statements by Air France ceo Pierre-Henri Gourgeon, who has said that there were no problems prior to August 2008.