The statements of eyewitnesses on the ground strongly support the conclusion that mechanical problems brought down flt 3407, not pilot error. It is probable that a malfunctioning propellor control unit(PCU) caused the prop to 'disc,' resulting in an uncommanded roll which led to the crash. Pieces of the engine were never found, and numerous people in the neighborhood said the plane was on fire as it came down.
The plane was two hours late taking off from Newark because they were doing mechanical repairs on it, though that part is strangely absent from the NTSB report.
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