Citation V/Ultra/Encore (C560)
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 200; Flight Crew Total 6000; Flight Crew Type 560
Troubleshooting; Situational Awareness; Confusion; Distraction
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown
Flight Crew Became Reoriented; Flight Crew Landed in Emergency Condition; Flight Crew Took Evasive Action; General Declared Emergency
Aircraft; Procedure; Human Factors; Environment - Non Weather Related
AP MIS Trim annunciation in the descent occurred. Disconnected the autopilot and tried to re-trim aircraft. I was unable to re-trim aircraft so decided it was a lodged trim in elevator trim control. Declared emergency; ran the appropriate checklist; and landed. Upon shutdown and paperwork I then went back into aircraft; turned battery back on and tried manual trim and when I did that notice my iPad was down there and had lodged the trim wheel. To prevent this from happening again I would make sure loose items; checklist; electronics; iPads need to be placed in a safe and secure location.
Upon descent; between four thousand and ten thousand feet; an annunciation 'Master Caution' illuminated with an 'AP Mistrim' illuminated. After the Master Caution switch was pressed the annunciation extinguished shortly after. The Captain (flying pilot) pressed and held down the AP disconnect button; disconnecting the AP. He then tried to manually trim the aircraft and the elevator trim wheel was jammed and would not move. At this point he asked me (first officer; non-flying pilot) to declare an emergency; request ground equipment to be standing by. He then instructed me to run the checklist. I proceeded to run the checklist for both AP Mistrim annunciation and then trim controls jammed. The Captain landed the aircraft safely and we taxied to the FBO. After deplaning the aircraft; the Captain went back in the aircraft to troubleshoot the problem with the power ON. First with the electronic trim then manually. Upon doing so the Captain noticed something was moving underneath the trim wheel. During the descent an iPad got lodged underneath the trim wheel and jammed the trim wheel. To prevent this from happening in the future; I suggest having the pilot's side pockets to be utilized for iPads; and the pilots rear pockets used for the checklist. This would prevent an iPad from sliding underneath the trim wheel and jamming the trim controls.
A CE-560 crew declared an emergency for an AP MISTRIM annunciation with a jammed trim wheel. After a safe landing the Captain discovered his iPad lodged under and jammed in the trim wheel.