The captain of Seastreak Wall Street lost control, causing a crash that injured dozens in Janaury 2013.
Passengers suffered "cuts and bruises" at the Liberty Island dock, boat company says.
Investigators found a damaged propeller on the side of the commuter ferry that crashed in lower Manhattan
Investigators said the Seastreak ferry captain tried to slow the boat but it would not go into reverse.
Federal investigators began their investigation Thursday into why the Seastreak crashed into a dock.
Investigators are looking into whether a mechanical mishap led to Wednesday's crash that left 57 hurt.
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