ANCHORAGE, Alaska (AP) — Federal investigators say a surviving passenger of a deadly floatplane crash in Alaska reported the aircraft nosed over abruptly after hitting a swell or wave during takeoff, causing the cabin to quickly fill with water.

A preliminary report of the July 19 crash released Tuesday by the National Transportation Safety Board says a witness reported the de Havilland DHC-2 Beaver seemed to accelerate slowly.

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According to the report, the witness said the plane climbed up to 100 feet before descending and cartwheeling onto the water upside down with seven people on board.

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A 57-year-old Maryland passenger, Joseph Patanella, died in the crash at the mouth of Tutka Bay south of Homer and one of his three children aboard was seriously injured.

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The others either weren’t injured or sustained minor injuries.