Emb-505 flight crew reported that ice on a taxiway surface resulted in a taxiway excursion.

Attributes
ACN	1719493
Time
Date	202001
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Make Model Name	EMB-505 / Phenom 300
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Person 1
Function	Pilot Flying Captain
Person 2
Function	First Officer Pilot Not Flying
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Clearance Ground Event / Encounter Loss Of Aircraft Control Ground Excursion Taxiway

Narrative:

After completing a normal approach and landing on runway xx in ZZZ we taxied via K and crossed runway xy and xz. As we crossed runway xz tower cleared us into the ramp with him. We saw a falcon taxing out and elected to turn right onto taxiway a and enter the ramp via north. Upon slowly turning onto taxiway a; we hit a sold sheet of ice on the taxiway. As I tried normal braking; the aircraft kept sliding uncontrollably through north. I then tried emergency braking still unable to stop the aircraft. We slowly went off the west side of the taxiway 180 degrees into the grass. The passengers and flight crew were not injured and performed a safely evacuation. My first officer during the event notified tower of the situation and reported baking action nil. Notams in ZZZ reported that all taxiways had ice and braking action poor.

Original NASA ASRS Text

Title: EMB-505 flight crew reported that ice on a taxiway surface resulted in a taxiway excursion.

Narrative: After completing a normal approach and landing on Runway XX in ZZZ we taxied via K and crossed Runway XY and XZ. As we crossed Runway XZ tower cleared us into the ramp with him. We saw a Falcon taxing out and elected to turn right onto Taxiway A and enter the ramp via N. Upon slowly turning onto Taxiway A; we hit a sold sheet of ice on the taxiway. As I tried normal braking; the aircraft kept sliding uncontrollably through N. I then tried emergency braking still unable to stop the aircraft. We slowly went off the west side of the taxiway 180 degrees into the grass. The passengers and flight crew were not injured and performed a safely evacuation. My First Officer during the event notified tower of the situation and reported baking action NIL. Notams in ZZZ REPORTED that all taxiways had ice and braking action POOR.

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.