Being obsessive and neurotic about plane crashes and reading all about them, I have read about this flight and the supposed hauting by the people who died on it.
But I am extremely skeptic about these incidents. The witness are often vague and contradicting, and delirium can often happen on airplanes. I've known someone who has worked for a major airline, and that person told me how pilots would often get literally insane for flying so much time, and being under a low-air-preassure environment all this time. This is something airliners don't usually say, but nervous breakdowns, delirium and insanity often happens to those professionals. On the airliner this person used to work, one day the pilot decided to take all his clothes off and walk around the airport...
So, although I belive on some anomalous phenomenons, I tend to discard this one.