Seneca fatal caused by lack of pilot unusual attitude training
Seneca fatal in Spain. Significant factors: Suspect runaway elev trim. Pilots and instructor lacked any training in unusual attitude recoveries. Flying school syllabus did not include unusual attitude recovery training. Instructor had dodgy instrument flying logged hours. POH lacked Autopilot supplements for that aircraft. Pilots failed to log defects in maintenance log.
http://www.moptc.pt/tempfiles/20091026122331moptc.pdf