In the doomed flight, fire erupted in the cargo bay six minutes after leaving Miami.

CNN: Fiery tests show probable cause for ValuJet nosedive

Six minutes after takeoff, fire erupted in the cargo bay.

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While a final report on the crash is not expected until next spring, the FAA has decided to require fire detectors and extinguishers in cargo compartments of 2, 800 older aircraft.

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While no official cause of the crash has been identified, the mislabeled canisters, which actually contained oxygen-making chemicals, are suspected of starting a fire in the plane's cargo hold.

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While no official cause of the crash has been named, sources have told CNN that 150 of the oxygen generators -- improperly packed and stowed in the DC-9's cargo hold -- are believed to have ignited the fire that brought down the plane.

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Safety concerns about lithium ion batteries as cargo recently prompted some airlines to begin isolating shipments and enhancing fire suppression.

WSJ: Japan Airlines' Jet Suffers Fire in Boston