http://www.troymedia.com/2014/05/16/the-human-factor-in-aircraft-automation/
article-the-human-factors-in-aircraft-automation#not-understanding-what-automation-is-doing1 "Even though it is unusual for automation systems to fail, pilots still need to be ready to cope with them if they occur. Unfortunately, it is more common that the pilot is not understanding what the automation is doing or telling them." article-the-human-factors-in-aircraft-automation#not-understanding-what-automation-is-doing1
article-the-human-factors-in-aircraft-automation#losing-manual-skills "...the study found that pilots were losing manual flying skills because of automation." article-the-human-factors-in-aircraft-automation#losing-manual-skills
article-the-human-factors-in-aircraft-automation#human-factors these advantages do come with a cost, and that cost is paid in the form of "human factors" issues. These issues include reduced situational awareness, flight crew workload, and the degradation of piloting skills. article-the-human-factors-in-aircraft-automation#human-factors