2009年12月15日火曜日

AR447 捜索再開

AR447の捜索を再開するようだ。
 エールフランス447便がブラジル沖の大西洋に墜落した事故の原因を
調べている仏事故調査局は、同機の飛行記録装置、操縦室の音声記録装置
が入ったいわゆる「ブラックボックス」の捜索を再開する見通しとなった。

CVFDRのアコーステックビーコンが電池切れとなり、潜水艦のソナーで
捜索するようだ。それこそ、「針を藁山から見つける」のと同様なくらい
難しいと思う。

AR445が、11/29-30に大西洋で1500mの急降下と言う類似した状況を発生
したようだ。類似しているだけで、AR447の本当の原因は不明のままだ。
事故解明のためにも見つかればと思う。


---エールフランス機墜落でレコーダー捜索再開へ 仏当局---
2009.12.14 Web posted at: 12:45 JST Updated - CNN
http://www.cnn.co.jp/world/CNN200912140006.html

(CNN) 今年6月、リオデジャネイロ発パリ行きの仏エールフランス447便(乗員、乗客228人)がブラジル沖の大西洋に墜落した事故の原因を調べている仏事故調査局は、同機の飛行記録装置、操縦室の音声記録装置が入ったいわゆる「ブラックボックス」の捜索を再開する見通しとなった。仏メディアが13日伝えた。

AFP通信によると、調査局責任者が、訪問先のリオデジャネイロで報道陣に語った。同責任者は、墜落機に搭乗していたブラジル人乗客の遺族と面会するため、同市を訪れていた。

ブラジル北東沖約1000キロの海域で、来年2月から最大3カ月間にわたり海底を探す。ソナー(水中音響探信機)を搭載した潜水艦などを派遣し、原因解明に全力を挙げる構えだ。

同機は乱気流に巻き込まれた後、電気系統の故障を示す自動メッセージを発信し、直後に消息を絶った。現場海域では大規模な捜索作業が行われたものの、遺体や残がいの大部分は発見されないまま、作業が打ち切られていた。調査局は、同機の速度センサーに異常があった可能性を指摘したが、墜落原因の特定には至っていない。


---France Investigates Another Troubled Flight---
By NICOLA CLARK
Published: December 10, 2009
http://www.nytimes.com/2009/12/11/world/europe/11iht-crash.html

PARIS - The French agency studying the cause of the fatal crash of an Air France jetliner six months ago confirmed Thursday that its investigators had opened an investigation into another incident involving an Air France jet of the same type under similar circumstances.

The second plane was forced to abruptly descend after encountering extreme weather in the same area of the Atlantic Ocean where the doomed plane is believed to have gone down.

A spokeswoman the French agency investigating the accident, BEA, said investigators had asked for access to the data from the onboard computers and were interviewing the crew of Air France Flight 445, an Airbus A330-200 that flew from Rio de Janiero to Paris on the night of Nov. 29-30.

Air France Flight 447, also an Airbus A330-200, was flying through an area of strong thunderstorms when it went down on the night of May 30 to June 1, about 960 kilometers, or 600 miles, off northern Brazil, killing 228 people aboard.

“There are a lot of striking similarities between the two flights - the route, the fact that it was at night, the difficult weather conditions,” said Martine Del Bono, an agency spokeswoman. “While we cannot know in advance whether this inquiry will provide complementary information about what happened to Flight 447, we cannot ignore such a coincidence.”

According to Air France, the plane - carrying 203 passengers and 12 crew members - encountered “severe turbulence” roughly four hours into the flight and the pilots requested authorization from air traffic controllers to descend to a lower elevation. After failing to get a response, the pilots sent out an emergency “mayday” message via radio that they were changing altitude, a communication that was picked up by another Air France flight nearby.

A French daily, Le Figaro, reported that Flight 445 descended from roughly 10,000 meters to 8,500 meters, or 33,000 feet to 28,000 feet - a drop of about 90 meters is normally called for by Air France procedures. Both Air France and the investigations office declined to comment on the report.

“We are providing all of the information requested by the BEA and Air France is providing its full collaboration and support to the investigation,” Veronique Brachet, an Air France spokeswoman, said.

According to Le Figaro, the Nov. 29 incident took place about 10 nautical miles from the area off the Brazilian coast where Flight 447 was when its computers sent out a series of automated messages - the plane’s last known communications - to a French maintenance center.

The maintenance messages have been a focus of the investigation into Flight 447 in the absence of the plane’s “black boxes” - the flight data and cockpit voice recorders, which, along with the bulk of the plane’s wreckage, have not been found. Those messages indicated that the air-speed sensors on Flight 447 had malfunctioned and investigators have said that this fault may have contributed to the crash.

In the latest incident, however, Le Figaro cited a person close to the investigation as saying that there was no sign that the air-speed indicators had failed.

French investigators plan to publish a second interim report on the Flight 447 crash on Dec. 17. A preliminary report published in July said an examination of the floating debris indicated that the plane had hit the water intact, but offered few additional clues to the cause of the disaster.France is planning a renewed search for the black boxes of Flight 447 early next year, with the support of experts and specialized equipment from the United States, Britain, Brazil and Russia.

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