There's a quite good site about the accident here : http://www.geocities.com/donuts13/index.htm
Especially, this page tells about the ghost story : http://www.geocities.com/donuts13/main_9.htm
Here's an extract from this page :
In the end, it appears that the source of the stories was an article in an issue of the Flight Safety Foundation. The article covered the story of an Eastern L-1011 ferry flight where the jet lost one of the two operating engines and the pilot had a challenging landing. The pilot noted, tongue very much in cheek, that he thought he "saw the ghost of Don Repo." This quote, which was obviously a joke, was presented in the Ghost of Flight 401 as fact. Combined with numerous anonymous witnesses and countless tales, the rumors spread throughout the aviation community. Eastern management must have taken the stories somewhat seriously, however. One retired Eastern L-1011 pilot I spoke to said that he had a second officer flying with him on a B-727 for several months in the Spring of '73 who was a self-ordained preacher. "He swore that Frank Borman had paid him to come to Miami and perform an exorcism on #318."