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| Title: | Flaps-up takeoff, Pan American World Airways, Inc., Boeing 707-321C, N799PA, Elmendorf Air Force Base, Anchorage, Alaska, December 26, 1968 |
| Micro summary: | This Boeing 707 crashed on takeoff with the flaps retracted. |
| Event Time: | 1968-12-26 at 0615 Alaska Standard Time |
| File Name: | 1968-12-26-US.pdf |
| Publishing Agency: | National Transportation Safety Board (NTSB) |
| Publishing Country: | USA |
| Report number: | NTSB-AAR-1969-08 |
| Pages: | 28 |
| Site of event: | Elmendorf AFB |
| Latitude/Longitude: | N61°16' W149°50'W |
| Departure: | Elmendorf Air Force Base, Anchorage, Alaska |
| Destination: | Cam Ranh Airport, Cam Ranh Bay, Vietnam |
| Airplane Type(s): | Boeing 707-321C |
| Flight Phase: | Takeoff |
| Registration(s): | N799PA |
| Operator(s): | Pan American World Airways |
| Type of flight: | Revenue |
| Occupants: | 3 |
| Fatalities: | 3 |
| Serious Injuries: | 0 |
| Minor/Non-Injured: | 0 |
| Other Injuries: | 0 |
| Executive Summary: | Pan American Clipper, N799PA, a Boeing 707-321C, cargo/mail flight bound for Vietnam via Tokyo, Japan, crashed on takeoff from Runway 23, Elmendorf AFB, Anchorage, Alaska, at approximately 0615 AST on December 26, 1968. The aircraft was destroyed. The accident was fatal to all three crewmembers, who were the only occupants aboard the aircraft. The takeoff was made with the flaps in the retracted position. A takeoff aural warning system,which is designed to alert the crew to the fact that the flaps are not in the proper takeoff position, did not activate. The Board determines that the probable cause of this accident was an attempted takeoff with the flaps in a retracted position. This resulted from a combination of factors: (a) inadequate cockpit check- list and procedures; (b) a warning system inadequacy associated with cold weather operations; (c) ineffective control practices regarding manufacturer's Service Bulletins; and (d) stresses imposed upon the crew by their attempts to meet an air traffic control deadline. |
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