Boeing is suing Able Aerospace Adhesives and AlfaKleen Chemical Labs for supplying a mislabeled chemical that caused the maiden flight of the KC-46 tanker to be delayed by a month.
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By US Air Force [Public domain], via Wikimedia Commons
The chemical damaged components in the jet’s refueling system and time was lost for replacing those parts.
The liquid was certified to meet MIL-PRF-680 Type III certification. However, it was actually more acidic than required.