PAN AMERICAN WORLD AIRWAYS, INC. BOEING 707-321C, N458PA, BOSTON, MASSACHUSETTS, NOVEMBER 3, 1973

At 0939 e.s.t., November 3, 1973, Pan American World Airways, Inc., Boeing 707-321C (N458PA) crashed at Logan International Airport, Boston, Massachusetts. The airplane was destroyed, and its three crewmembers were killed. The National Transportation Safety Board determines that the probable cause of the accident was the presence of smoke in the cockpit which was continuously generated, and uncontrollable. The smoke led to an emergency situation that culminated in loss of control of the aircraft during final approach, when the crew in uncoordinated action deactivated the yaw damper in conjunction with incompatible positioning of flight spoilers and wing flaps. The Safety Board believes that the spontaneous chemical reaction between leaking nitric acid, improperly packaged and stowed, and the improper sawdust packing surrounding the acid's package initiated the accident sequence.

  • Corporate Authors:

    National Transportation Safety Board

    Office of Aviation Safety
    Washington, DC  USA  20594
  • Publication Date: 1974-12-2

Media Info

  • Pagination: 120 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00090404
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: NTSB-AAR-74-16
  • Files: NTIS
  • Created Date: May 29 1975 12:00AM