French investigators on Tuesday recovered the cockpit voice recorder from an Air France flight that plunged into the Atlantic Ocean almost two years ago, killing all 228 people on board. The machine that records cockpit conversations was located Monday and raised from the ocean depths on Tuesday, according to BEA, the French agency that probes air accidents. The plane's flight data recorder was pulled out on Sunday, meaning both pieces critical to determining the cause of the June 1, 2009 crash have now been found. The memory unit was found by a submarine probing (12,800 feet) 3,900 meters below the ocean's surface. Experts have said without the two recorders there would be almost no chance of determining what caused the worst disaster in Air France's history. Flight 447 from Rio de Janeiro to Paris slammed into the Atlantic northeast of Brazil after running into an intense high-altitude thunderstorm. The condition of the instruments was not immediately clear. BEA officials have warned that the recordings may yet prove unusable, considering the pressure they were subjected to for nearly two years at such ocean depths. "We can't say in advance that we're going to be able to read it until it's been opened," a BEA spokeswoman told The Associated Press in a telephone interview. She did not give her name in accordance with her agency's policy.