A320 flight crew reported they encountered ice on the ramp and lost braking capability.

Attributes
ACN	1716026
Time
Date	202001
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 8 Flight Crew Total 3735 Flight Crew Type 923
Events
Anomaly	Ground Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Weather / Turbulence

Narrative:

Taxiing into ZZZ. Captain had completed turn. Taxiing straight ahead he stated he had no brakes. I did not perceive his taxi speed as excessive for the conditions. Apparently the ramp had a thin layer of fresh snow on top of ice. I queried if I should set the parking brake. He agreed and shortly afterwards the airplane came to a stop. There was no damage to equipment or personnel. A ramp employee stated he threw a chock under a wheel because it appeared we were sliding.

Original NASA ASRS Text

Title: A320 flight crew reported they encountered ice on the ramp and lost braking capability.

Narrative: Taxiing into ZZZ. Captain had completed turn. Taxiing straight ahead he stated he had no brakes. I did not perceive his taxi speed as excessive for the conditions. Apparently the ramp had a thin layer of fresh snow on top of ice. I queried if I should set the parking brake. He agreed and shortly afterwards the airplane came to a stop. There was no damage to equipment or personnel. A ramp employee stated he threw a chock under a wheel because it appeared we were sliding.

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.