The US Federal Aviation Administration last week ordered the fuselage
insulation in nearly 700 commercial aircraft to be replaced within the next four
years. An FAA study found that the Mylar insulation lining the fuselage actually
help to fire to spread, prompting suspicions about the spread of fire in last
year鈥檚 Swiss Air crash. Other insulation materials also marginally failed the
FAA鈥檚 new tests, but will not be replaced.
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