Pan Am Boeing 747-121
Scale: 1:200
Publisher/Brand: Inflight200
Construction: Diecast Metal
Size: Approx W 29.8 x L 35.3 x H 9.8 cm
Livery: Pan Am
Reg #: N748PA
Designation: Jet Clipper America (1970–1973), Leased to Air Zaire named Mont Floyo (1973–1975), returned to Pan Am-Clipper Sea Lark (1975–1980), Clipper Juan T. Trippe (1980–2010)
Stand: Yes
Production: Limited
Release Date: September 2024
Version: Diecast metal, with stand, with antenna, with landing gear
Colours: as shown
History:
On July 30, 1971, while operating as Pan Am Flight 845, N747PA struck an approach lighting system while taking off. The crew had planned and calculated their takeoff for runway 28L but discovered only after pushback that the runway had been closed hours earlier for maintenance and that the first 1,000 feet (300 m) of runway 01R, the preferential runway at that time, had also been closed. After consulting with Pan Am flight dispatchers and the control tower, the crew decided to take off from runway 01R, shorter compared to 28L, with less favorable wind conditions.
Runway 01R was about 8,500 feet (2,600 m) long from its displaced threshold (from which point the takeoff was to start) to the end, which was the available takeoff length for Flight 845. Because of various misunderstandings, the flight crew was erroneously informed the available takeoff length from the displaced threshold was 9,500 feet (2,900 m), or 1,000 feet (300 m) longer than actually existed. Despite the shorter length, it was later determined that the aircraft could have taken off safely had the proper procedures been followed.
As the crew prepared for takeoff on the shorter runway, they selected 20 degrees of flaps instead of their originally planned 10-degree setting but did not recalculate their takeoff reference speeds (V1, Vr and V2), which had been calculated for the lower flap setting, and were thus too high for their actual takeoff configuration.
Consequently, these critical speeds were called late, and the aircraft's takeoff roll was abnormally prolonged. In fact, the first officer called Vr at 160 knots (300 km/h; 180 mph) instead of the planned 164 knots (304 km/h; 189 mph) because the end of the runway was "coming up at a very rapid speed."
One of the light beams penetrated the cabin and injured two passengers, with one having his foot nearly amputated. The right main under-body landing gear was forced into the fuselage, while the left gear was ripped loose and left dangling. Three of the four hydraulic systems were taken out, as well as several wing and control surfaces, antiskid control and three evacuation slides. The aircraft landed back in San Francisco after dumping fuel. Due to the missing landing gear and shift in the center of gravity from dumping fuel, N747PA settled on its tail with the nose up. In total, there were 29 injuries, with 8 requiring hospitalization.[3][4]
The National Transportation Safety Board concluded that pilot error was the cause of the accident, citing the crew's incorrect input of takeoff reference speeds and the unusual nature of the events that led up to the collision.
Pan Am ceased operation in 1991. It was leased out by General Electric Credit Corpoartion and in 1997 the aircraft was grounded and used for spare parts. Completely dismantled in 1999.
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