Ce-550B flight crew reported a temporary loss of communications; autopilot; and an altitude loss due...

Attributes
ACN	1540358
Time
Date	201805
Local Time Of Day	0601-1200
Place
Locale Reference	ZHU.ARTCC
State Reference	TX
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Citation II S2/Bravo (C550)
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	STAR CENTERPOINT TWO
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 110 Flight Crew Total 2350 Flight Crew Type 160
Person 2
Function	Pilot Flying Captain
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Inflight Event / Encounter Weather / Turbulence Inflight Event / Encounter Loss Of Aircraft Control

Narrative:

We were level at FL230 and cleared to deviate left or right of course for weather. We picked what looked to be the best course to cross the line; but upon penetrating the clouds we encountered severe turbulence. The turbulence caused the auto pilot and comm failure. Also due to the turbulence we had an altitude loss of 2;000 ft. After stabilizing the airplane and checking on the passengers and climbing back to our assigned altitude; we were able to reset the autopilot. It took approximately 10 minutes to reestablish radio communication. Due to the fact we were above a solid layer we started to a descent in accordance with lost comm procedures while trying to re-establish communication. After several resets we were able to contact guard 121.5 and advise of the situation; they gave us san antonio approach's frequency. We advised them of our deviation and the cause and were able to land with no further incidents. Upon landing there were no injuries to passengers or crew and after a walk around of the plane no damage evident.

Original NASA ASRS Text

Title: CE-550B flight crew reported a temporary loss of communications; autopilot; and an altitude loss due to severe turbulence.

Narrative: We were level at FL230 and cleared to deviate left or right of course for weather. We picked what looked to be the best course to cross the line; but upon penetrating the clouds we encountered severe turbulence. The turbulence caused the auto pilot and comm failure. Also due to the turbulence we had an altitude loss of 2;000 ft. After stabilizing the airplane and checking on the passengers and climbing back to our assigned altitude; we were able to reset the autopilot. It took approximately 10 minutes to reestablish radio communication. Due to the fact we were above a solid layer we started to a descent in accordance with lost comm procedures while trying to re-establish communication. After several resets we were able to contact guard 121.5 and advise of the situation; they gave us San Antonio approach's frequency. We advised them of our deviation and the cause and were able to land with no further incidents. Upon landing there were no injuries to passengers or crew and after a walk around of the plane no damage evident.

Data retrieved from NASA's ASRS site 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.

Ce-550B flight crew reported a temporary loss of communications; autopilot; and an altitude loss due to severe turbulence.