(CNN) - A top executive for the company to build a "black box" aboard Air France Flight 447 said she hopes the company's 100 percent recovery of the air accident record will be maintained despite fears the device may be lost at the bottom of the Atlantic Ocean. Although some debris was taken, air crash investigators remain in the dark about what the cause airliner to plunge into the sea at the coastal Brazil with 228 people onboard the beginning of this month. Debris that is believed to be approximately 4500 meters (15,000 feet) deep, in the middle bottom of the mountain, and mixed with the tons of waste water.
A French nuclear submarine and other ships searching for the flight recorder data by trying to track the underwater locator beacon, the device that will send acoustic pulses, or "ping," the search.
The U.S. Navy has two high-tech acoustic device - known as the "towed pinger locators" - the French have been connected to the tug boat and can search up to depth of 20,000 feet.
Honeywell Aerospace's Paolo Carmassi - the firm's president for Europe, Middle East, Africa and India - told CNN that take the flight data can help solve the mystery of the plane's fate, and said to the company has never lost a single black box that is involved in an accident.
"We believe that our technology is good for the position, in this case, to contribute to solve the big questions about the accident," said Carmassi.
"We have a 100 percent recovery rate of all black box that we have installed that unfortunately may have been involved in an accident so we hope that we will be able to maintain the record and we can shed some light on what happened." Carmassi but he acknowledges it is difficult to estimate how much the battery has left locator beacons. "There are a few depending on the duration of the specific environmental conditions, either from below or above the ground, both on 10 meters or 4000 meters, so it is very difficult for the appropriate period of time with the right," he said.
Yann Cochennec, an aviation expert for the Air et Cosmos magazine, told CNN a black box that has been taken from the sea floor in 2004 after the Egyptian charter flight crashed into the Red Sea shortly after leaving Sharm el-Sheikh.
But he said that in the Atlantic depths, strong currents and bad weather will make taking the wreckage of Air France is much more difficult.
The "black box" is actually an orange cylinder - about 13 pounds of metal wrapped around the stack memory chip that is designed to survive and a high temperature, strong and the impact of tons of pressure.
The device - which records every detail about how an airplane works, including air pressure, the plane's speed and altitude, how much fuel the plane was and whether the fuel is flowing properly - has important role in air crash investigation since they installed the first plane to commercial in the 1940s.
thx to (CNN)
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