An investigation by the Occupational Safety and Health Administration found that the death of a Plainville firefighter in July was an accident.
Ray Moreau was killed when responding to a house fire on Maria Road July 27.
The investigation found that Moreau was trapped against a truck when a hose became tangled in the wheels of an engine.
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A line broke off, which caused him to be struck by a 35-pound intake valve that broke off, launching Moreau about 10 feet.
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