◆ SpookStack

DIRECTOR, FBI (164-2111) January 10, 1972 SAC, SEATTLE (164~81) (P) St EB. #e F. NORJAK AA. There is being sent under separate cover a copy of a film taken by the U. S. Air Force cameraman from a chase plane adjacent to the Northwest Boeing 727 during the simulated flight made on January 6, 1972 to determine the reactions of the airplane to the dropping of approximately 235 pounds from the rear steps in the same manner which is believed te have been used by the hijacker. A review of the film shows the normal flight, together with a depression of the stairway as the load descends on the steps. The Bureau is requested, if it desires, to review the film and then return it to the Seattle Office, it being tha original copy. A copy has been made of the film for the re S. Air Force par their request, and Northwest Airlines for ts review. There are also enclosed in the same package sequential black and white still photos showing the depression of the rear stairway by the addition of the sled and the reaction of the stairway to the actual departure of the aled, it being noted that the stairway immediately returned to a near Closed position when the weight was taken from it. 3 ~ Bureau (i ~ Package) \ ; - Seattle > M/cjw se . Ines 7 mene a“ 754 agh nee Toes I. DB Cooper-5724 (64 B/~ 184]