"Stealt materials."
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Costly corrosion problems on the F-22 caused by stealth materials and
coatings have been addressed on the F-35, but risks remain, concludes
a report by the U.S. Government Accountability Office.
The GAO's presentation to Congress on its review of the DoD's
corrosion evaluation report on the F-22 and F-35, completed at the end
of September, says:
"Corrosion of the aluminum skin panels on the F-22 was first observed
in spring 2005, less than 6 months after the Air Force first
introduced the aircraft to a severe environment. By October 2007, a
total of 534 instances of corrosion were documented, and corrosion in
the substructure was becoming prevalent. For corrosion damage
identified to date, the government is paying $228 million to make F-22
corrosion-related repairs and retrofits through 2016."