: Recently a commercial large jet was cleared for an ILS approach to Runway 28 at Chicago O’Hare airport. While inbound to intercept the Glide slope, the cockpit indications were initially full up. Abruptly the display changed from full up to full down position and the aircraft pitched down and descended to stay on the glide slope. The pilot reacted to disconnect the autopilot, but not before the aircraft had descended a 100 ft. The display restored to full up deflection soon thereafter. This anomaly was ... ...  #Promote the Blog www.flight-blog.com 
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