Narrative:

I was descending from FL350 to FL330 on autopilot; I encountered several emergency warning lights on my crew alerting system (cas) on the multi-function display. They occurred just as the aircraft was approaching FL330. First; there was the airspeed disagree; followed by stick pusher failure and then the yaw damper and the autopilot disengaged. Then the air data computer 3 failed. As I was reacting to these emergencies; the aircraft descended below FL330 and I corrected as soon as possible back to FL330; but could not engage the autopilot or yaw damper. I informed the controller I was having problems. Shortly thereafter I got an audible and visual stall warning and the equivalent airspeed froze at approximately 235 knots. The stall warning remained on for 15 to 20 minutes. I informed the next controller I was having problems and continued to analyze the situation. I requested a descent in order to descend below rvsm. I continued my descent and at approximately 14;000 feet the stall warning stopped and I was able to engage the yaw damper. The landing was uneventful. The consensus was water in the pitot or static system. I have taken corrective action and determined that it was water in the static system. I have flown five times since at 14;000; 11;500; FL330; FL340 and 11;500 and experienced no further problems. I now put colored tape over the static ports before departing the aircraft (if left outside).

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Original NASA ASRS Text

Title: An Eclipse Jet EA50/W had water in the static system causing the stall warning system to activate; the autopilot to not function; and ADC 3 to fail. The systems return to normal below 14;000'.

Narrative: I was descending from FL350 to FL330 on autopilot; I encountered several emergency warning lights on my crew alerting system (CAS) on the multi-function display. They occurred just as the aircraft was approaching FL330. First; there was the Airspeed Disagree; followed by Stick Pusher Failure and then the Yaw Damper and the Autopilot disengaged. Then the ADC 3 failed. As I was reacting to these emergencies; the aircraft descended below FL330 and I corrected as soon as possible back to FL330; but could not engage the autopilot or yaw damper. I informed the Controller I was having problems. Shortly thereafter I got an audible and visual Stall Warning and the equivalent airspeed froze at approximately 235 knots. The Stall Warning remained on for 15 to 20 minutes. I informed the next Controller I was having problems and continued to analyze the situation. I requested a descent in order to descend below RVSM. I continued my descent and at approximately 14;000 feet the Stall Warning stopped and I was able to engage the yaw damper. The landing was uneventful. The consensus was water in the pitot or static system. I have taken corrective action and determined that it was water in the static system. I have flown five times since at 14;000; 11;500; FL330; FL340 and 11;500 and experienced no further problems. I now put colored tape over the static ports before departing the aircraft (if left outside).

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.