The strange tales of the ghostly airmen of Flight of 401 circulated in the airline community. An account of the paranormal happenings even appeared in a 1974 US Flight Safety Foundation's newsletter. John G. Fuller, the best-selling author of The Ghost of Flight 401, carried out an exhaustive investigation into the hauntings with the aid of several cautious airline personnel. A mass of interesting testimony was produced as a result.
Although Eastern Airlines refuses to discuss the matter, researchers have interviewed numerous individuals claiming to have encountered the ill-fated pair on L-1011s. As the reports would have it, Loft and Repo have devoted their after-lives to watching over the passengers and crew of these little Lockheed passenger planes. Many come from people in highly responsible positions: pilots, flight officers, even a vice president of Eastern Airlines, who allegedly spoke with a captain he assumed was in charge of the flight, before recognizing him as the late Loft.
Other sightings are convincing because they have multiple witnesses. A flight's captain and two flight attendants claim to have seen and spoken to Loft before take-off and watched him vanish - an experience that left them so shaken they cancelled the flight.
One female passenger made a concerned enquiry to a flight attendant regarding the quiet, unresponsive man in Eastern Airlines uniform sitting in the seat next to her, who subsequently disappeared in full view of both of them and several other passengers, leaving the woman hysterical. When later shown a sheet of photos depicting Eastern flight engineers, she identified Repo as the officer she had seen.
Another incident occurred when one of the L-1011 passenger planes that fitted with salvaged parts was due for take-off. The flight engineer was mid-way through carrying out the routine pre-flight inspection when Repo appeared to him and said, "You don't need to worry about the pre-flight, I've already done it."
Repo and Loft are apparently not content merely to be present on these airplanes. Often their style is far more hands on, particularly in Repo's case. Aside from his appearance to a pre-flight engineer whom he appeared to have been assisting, there is testimony from a flight attendant who observed a man in flight engineer's uniform, whom she later recognized as Repo fixing a galley oven. The insistence of the plane's own flight engineer that he had not fixed the oven, and that there had not been another engineer on board, would seem to lend weight to her claim. Repo has also been seen in the compartment below the cockpit by a flight engineer who had accessed it in order to investigate a knocking he heard coming from there.