A320
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 8; Flight Crew Total 3735; Flight Crew Type 923
Situational Awareness
Ground Event / Encounter Loss Of Aircraft Control; Inflight Event / Encounter Weather / Turbulence
Flight Crew Regained Aircraft Control
Weather; Human Factors
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.
A320 flight crew reported they encountered ice on the ramp and lost braking capability.