|
Pan Am Flight 923 was a Douglas DC-4 operating from Seattle, Washington to Juneau, Alaska, which crashed into Tamgas Mountain on Annette Island, Alaska, on October 26, 1947. All 18 passengers and crew on board were killed. The crash was the worst in Alaskan commercial aviation at the time, as well as the first crash of a Pan Am four-engine aircraft. An investigation by the Civil Aeronautics Board (CAB, the precursor to the NTSB) was unable to determine probable cause and it remains unknown to this day. == Flight history == Flight 923 was a regularly-scheduled Pan American Airways flight between Seattle and Juneau, with a scheduled stopover at Annette Island Airport. The aircraft left Seattle at 10:30 A.M. on October 26, 1947. It was scheduled to arrive in Juneau around 3:00 P.M. that same day. There were five Pan Am crew members aboard: three cockpit crew and two pursers. The pilot was Captain Alf N. Monsen, a veteran pilot with 13,565 hours of flying time. His copilot was First Officer Laurence A. Foster, another captain who was serving as copilot and first officer due to personnel reductions at Pan Am. The flight engineer was C. L. Dunwoody.〔Civil Aeronautics Board. Docket #SA-155. File #1-0099-47.(Accident Investigation Report: Pan American Airways -- Annette Island, Alaska -- October 26, 1947 ). US Department of Transportation. Accessed online on November 17, 2013. (The report is indexed at (NTLL Special Collections ); also indexed at (Investigations of Aircraft Accidents 1934-1965 ).)〕 The aircraft for the flight was a Douglas DC-4, a four-engine propliner, registration NC88920, and had been in service since 1944, accumulating 4,146 hours of flying time.〔 Maintenance records obtained by the CAB after the crash indicated that the airplane was in good working condition, with no reported mechanical failures or issues.〔 The aircraft departed Seattle on schedule at 10:30 A.M.. There were 13 passengers aboard, along with of cargo and of fuel.〔 The aircraft was well within weight and load limits, and was only carrying a quarter of its usual capacity of 44 passengers.〔 Prior to departure, Captain Monsen received a weather report from Pan American's meteorologist, which indicated that a cold front would be passing through Annette Island prior to the flight's arrival.〔 The first leg of the journey was uneventful, up until the aircraft reached the radio range station near the Annette airport. The radio range station was located northwest of the airport. Air Traffic Control cleared the flight to pass over the range station at 7,000 feet and then to proceed with a normal landing. Captain Monsen acknowledged the clearance at 1:38 PM and reported his position over the range station at 7,000 feet.〔〔 Five minutes later, at 1:43, the Captain radioed Annette control tower and aborted his approach. He reported extreme turbulence at lower elevations, and indicated that he would instead continue to Juneau without landing at Annette. This was the last radio contact made with the aircraft. After Captain Monsen had radioed his intent to Juneau, the control tower radioed an acknowledgement and asked for Flight 923's altitude. When the control tower was unable to reestablish radio communications, the station issued an alert that Flight 923 had gone missing. The alert was issued at 2:01 P.M..〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pan Am Flight 923」の詳細全文を読む スポンサード リンク
|