Family members claim that he was not responsible for the accident and that 1. He was told the runway was 1,000 feet longer than it actually was. 2. The engines were underperformed by 200-300 feet & Boeing could not inform the NTSB why. 3. The plane was overloaded for the runway by 11,000lbs. My Grandfather asked SFO about runway length, PanAm and Boeing about weight for runway 1R. They all gave him false information. It shouldn't have been able to take off.

Just out of curiosity. Do you know why the V speeds weren't recalculated?