Tbm-850 captain reported moderate vibration from severe icing event.

Attributes
ACN	1595177
Time
Date	201811
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
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	Other Filed
Flight Plan	IFR
Person 1
Function	Captain Single Pilot
Qualification	Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Commercial Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 6500 Flight Crew Type 1000
Events
Anomaly	Aircraft Equipment Problem Less Severe Inflight Event / Encounter Weather / Turbulence

Narrative:

While in cruise flight IMC/OAT=(-20) experienced an icing event (rate-severe; accumulation-moderate) in which the airplane developed a moderate vibration. I informed ATC and requested a descent and deviation to ZZZ. Descending thru FL120 (OAT=(-5) the vibration stopped. I continued to ZZZ and with a normal approach and landing; and taxied to the FBO. I conducted a thorough walk-around and visual inspection of the aircraft and tested all its systems as per the checklist and found nothing abnormal. ATC/TRACON/tower all accommodated my request for priority handling and no in flight emergency was needed or declared. I refiled my IFR flight plan and departed to [my original destination]. The flight was normal.

Original NASA ASRS Text

Title: TBM-850 Captain reported moderate vibration from severe icing event.

Narrative: While in cruise flight IMC/OAT=(-20) experienced an icing event (rate-severe; accumulation-moderate) in which the airplane developed a moderate vibration. I informed ATC and requested a descent and deviation to ZZZ. Descending thru FL120 (OAT=(-5) the vibration stopped. I continued to ZZZ and with a normal approach and landing; and taxied to the FBO. I conducted a thorough walk-around and visual inspection of the aircraft and tested all its systems as per the checklist and found nothing abnormal. ATC/TRACON/TOWER all accommodated my request for Priority Handling and no in flight emergency was needed or declared. I refiled my IFR Flight Plan and departed to [my original destination]. The flight was normal.

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.