Tbm-850 pilot reported an uncontrollable loss of altitude due to a severe turbulence encounter.

Attributes
ACN	1542103
Time
Date	201805
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	TBM 700/TBM 850
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	IFR
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 15900 Flight Crew Type 15
Events
Anomaly	Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Weather / Turbulence

Narrative:

Cruise at 16;000 feet MSL and encountered severe turbulence and upset. I gained control of the aircraft at about 13;200 feet and recovered to our assigned altitude of 16;000 feet. Center acknowledged they showed us at a lower than assigned altitude. I responded with the information of the upset and we were climbing back to our assigned altitude of 16;000 feet and center responded no problem.

Original NASA ASRS Text

Title: TBM-850 pilot reported an uncontrollable loss of altitude due to a severe turbulence encounter.

Narrative: Cruise at 16;000 feet MSL and encountered severe turbulence and upset. I gained control of the aircraft at about 13;200 feet and recovered to our assigned altitude of 16;000 feet. Center acknowledged they showed us at a lower than assigned altitude. I responded with the information of the upset and we were climbing back to our assigned altitude of 16;000 feet and center responded no problem.

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.