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Evidence for an Issue 3 pieces of evidence for this issue.

inadvertent autopilot disengagement may be too easy (Issue #123) - It may be too easy for the pilot to inadvertently disengage the autopilot. When this happens, control may be lost.

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  2. Evidence Type: Excerpt from Survey
    Evidence: 4 of the 30 (13%) respondents reported a 4 (= agree) or 5 (= strongly agree) with pc123 inadvertent autopilot disengagement may be too easy
    Strength: +1
    Aircraft: unspecified
    Equipment: automation
    Source: Lyall, E., Niemczyk, M. & Lyall, R. (1996). Evidence for flightdeck automation problems: A survey of experts. See Resource details

  3.  
  4. Evidence Type: Excerpt from Survey
    Evidence: 19 of the 30 (63%) respondents reported a 1 (=strongly disagree) or a 2 (=disagree) with pc123 inadvertent autopilot disengagement may be too easy
    Strength: -3
    Aircraft: unspecified
    Equipment: automation
    Source: Lyall, E., Niemczyk, M. & Lyall, R. (1996). Evidence for flightdeck automation problems: A survey of experts. See Resource details

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  6. Evidence Type: Excerpt from Survey
    Evidence: In response to the open-ended "Question 1. Describe in detail an error which you made, or observed, in the DC-9/MD-88 that could have led to an incident or violation. How could it have been avoided? (equipment design? Training? crew coordination?). Please describe specifically what occurred?" One pilot responded by describing a situation involving a DC-9 altitude deviation, "While cruising at 31,000 the autopilot was inadvertently turned off or kicked off by itself and the A/C began a slow descent. We noticed it at about 250 feet below our assigned altitude. 48" (page 70, 75)
    Strength: +1
    Aircraft: MD88 & DC9
    Equipment: autoflight: autopilot
    Source: Wiener, E.L. Chidester, T.R., Kanki, B.G., Palmer, E.A., Curry, R.E., & Gregorich, S.E. (1991). The Impact of Cockpit Automation on Crew Coordination and Communication: I. Overview, LOFT Evaluations, Error Severity, and questionnaire data. NASA Contractor Report 177587. See Resource details
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