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£0302 (REV, 11-27-70) r FEDERAL BUREAU OF INVESTIGATION i Dote of tronscription November 30, 1971 Je b6 Boeing Company, Seattle, Washington, telephone bic furnished the following’ information: ' He was b6 project and b7C several occasions during| ___asumirert we | owered the rear stairs under a he b7C while in flight, The effect of lowering these stairs in flight was hardly noticeable on the controls and the only positive indication he had that the stairs were lowered was ‘the lighting of an indicator light on the instrument panel,. The stairs were lowered at a speed of 150 knots, while the stairs were lowered the plane remained in the same attitude, There was no yawing or pitching, He furnished the following opinions in connection ‘with the question of whether or not a pilot would feel in his controls a sudden loss of weight of approximately 180 pounds from the tail of a 727, He advised that if the pilot were flying the aircraft manually and if the air were calm, he ‘would feel a sudden loss of 180 pounds weight from the tail of the aircraft, He explained that the loss of this weight would move the center of gravity toward the front of the airplane and while’ this movement would be slight, it could be felt in the wheel by the pilot, He stated, however, that if the air were turbulent, it ds doubtful that the pilot would fee] this sudden loss of ‘weight, He indicated also that if the plane were being {flown on auto-pilot the loss of this weight would not be felt by the pilot, He advised that if the rear stairs on a 727 is lowered in flight at an altitude of less than 10,000 feet a change in pressurization occurs and this could pe felt by the crew if ‘the door leading into the cockpit is open, If the cockpit door were closed, it is doubtful that the crew a experience the change in’ pressurization, wetviewdd one 29772 _»_ Seattle, Washington... SE 164-81-2087 11/30/71 «be SA by Dote dictoted b7Cc This document contains Aeither recommendations nor conclysions of the FBI, It is the property of the FEI ond is looned lo youl agency: it ond its contents ore not to be distribvied outside your ogency. ; . ; DB Cooper-6199