EMB505 captain at FL400 experiences failure the autopilot followed by the yaw damper and the ventral...

Attributes
ACN	1125593
Time
Date	201310
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Embraer Legacy 450/500
Operating Under FAR Part	Part 135
Flight Phase	Cruise
Component
Aircraft Component	Autopilot
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

While at cruise at 40;000 ft we has a cas message stating we has lost our autopilot; yaw damper and ventral rudder; a dutch roll started and an emergency descent was initiated and ATC advised of our actions. Aircraft was descended to 10;000 ft where we leveled off and diverted. ATC was advised of same and a normal landing was made. While in the emergency descent ATC was clearing us to flight levels that we could not stop at; we advised ATC to turn us if they needed and they did.

Original NASA ASRS Text

Title: EMB505 Captain at FL400 experiences failure the autopilot followed by the yaw damper and the ventral rudder. An emergency descent is initiated and the flight diverts to a suitable airport.

Narrative: While at cruise at 40;000 FT we has a CAS message stating we has lost our autopilot; yaw damper and ventral rudder; a dutch roll started and an emergency descent was initiated and ATC advised of our actions. Aircraft was descended to 10;000 FT where we leveled off and diverted. ATC was advised of same and a normal landing was made. While in the emergency descent ATC was clearing us to flight levels that we could not stop at; we advised ATC to turn us if they needed and they did.

Data retrieved from NASA's ASRS site as of July 2013 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.

EMB505 captain at FL400 experiences failure the autopilot followed by the yaw damper and the ventral rudder. An emergency descent is initiated and the flight diverts to a suitable airport.