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This June 2023 image provided by Pelagic Research Services shows remains of the Titan submersible on the floor of the Atlantic Ocean. (Pelagic Research Services via AP)

NTSB engineer says carbon fiber hull from submersible showed signs of flaws

An engineer with the National Transportation Safety Board says the carbon fiber hull of the experimental submersible that imploded en route to the wreckage of the Titanic had imperfections dating to the manufacturing process

By PATRICK WHITTLE and DAVID SHARP
Published - Sep 25, 2024, 08:12 PM ET
Last Updated - Dec 16, 2024, 06:54 PM EST

The carbon fiber hull of the experimental submersible that imploded en route to the wreckage of the Titanic had imperfections dating to the manufacturing process and behaved differently after a loud bang was heard on one of the dives the year before the tragedy, an engineer with the National Transportation Safety Board said Wednesday.

Engineer Don Kramer told a Coast Guard panel there were wrinkles, porosity and voids in the carbon fiber used for the pressure hull of OceanGate's Titan submersible. Two different types of sensors on Titan recorded the “loud acoustic event” that earlier witnesses testified about hearing on a dive on July 15, 2022, he said.

Hull pieces recovered after the tragedy showed substantial delamination of the layers of carbon fiber, which were bonded to create the hull of the experimental submersible, he said.

OceanGate co-founder Stockton Rush was among the five people who died when the Titan submersible imploded in June 2023.

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