Date: 11 Feb 98 04:24:14 From: firstname.lastname@example.org (WSherr6080) Organization: AOL http://www.aol.com References: 1 2 3 4
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The Boeing 720B is 8 feet shorter than the 707 and therefore more susceptible to a weather induced 'pitch-up' from a strong updraft, due to the shorter moment arm. e.g., The Northwest Airlines Boeing 720B fatal accident near Miami, Fl. on February 12, 1963 the pilots' reacted to a weather induced 'pitch-up' by trimming both the horizontal stabilizer and the elevators full nose down, along with a strong forward pitch control input. The aircraft was upset into a vertical dive. The crew had about 35 seconds to recover from 19,000 feet. The aircraft came apart in the air.