From: "David G. Davidson" <firstname.lastname@example.org> Organization: http://members.aol.com/tristar500/l1011 Date: 10 Jul 96 12:47:14 References: 1 2
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>>Sounds like an autopilot failure.<< The 727 is notorious for having an autopilot that 'porpoises'. It's generally caused by slop in the linkage in the elevator and stabilizer position sensors. This can also be caused by a bad air data computer or the pitch computer.