It cost $368 Million when the FAA forced operators to replace Mylar insulation (cause of at least two accidents): http://findarticles.com/p/articles/mi_m0UBT/i

It cost $368 Million when the FAA forced operators to replace Mylar insulation (cause of at least two accidents): http://findarticles.com/p/articles/mi_m0UBT/is_10_19/ai_n12941245/ http://findarticles.com/p/articles/mi_m0UBT/is_10_19/ai_n129... According to this very interesting IEEE article, it costs anywhere from $1-5M per airplane, which doesn't include lost business cost: http://spectrum.ieee.org/aerospace/aviation/down-to-the-wire/0 http://spectrum.ieee.org/aerospace/aviation/down-to-the-wire...