Narrative:

On arrival into ZZZ; center informed us that the airport operations was currently in the process of sweeping the runway and would be done by the time we arrived. We were given a field condition report by the dispatcher of 3/3/3 that was on 20 minutes old at the time of receipt. The captain (ca) was monitoring CTAF and heard the trucks report they were clear of the runway shortly before we arrived. On landing we discovered that the braking report of 3/3/3 was inaccurate and braking was nil. I attempted to use brakes along with thrust reverses but could feel the wheels were sliding. Soon the nose started to depart the center line as we were trying slow the airplane. The ca took over the controls in an effort to try to get us back to center line but the plane kept on its course towards the edge of the runway. As we approached the edge the aircraft finally started to turn back to the right but the airplanes momentum carried it into the grass. We departed the runway approximately 6500 feet down the runway to the left side going into the grass about 30 feet at an angle.threats included the deteriorating weather conditions that was occurring. We were monitoring a potential overweight landing situation. The braking report we were given was already almost 30 minutes old by the time we received it. The airplane sliding on the snow was the undesired aircraft state that we were trying to overcome.in looking back I feel the captain and I did everything we could have. I had briefed that I was going to use maximum thrust reverse to assist in slowing the aircraft in case the runway was slippery. We were going off a braking report of 3/3/3 that we felt was still accurate. Center had advised us the trucks were on the runway clearing the snow and they would be off by the time we got there. The ca heard the trucks report on the CTAF they were clear of the runway so we felt that it would be cleared better than it was. When we landed and realized the braking was nil and the plane started to depart center line the ca took controls and tried to do everything he could to get the airplane to return to center line and stop before we went into the grass.

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Original NASA ASRS Text

Title: EMB-145 Flight crew reported receiving a bad braking action report; and upon touchdown had trouble controlling the aircraft and ended up sliding off the left side of the runway.

Narrative: On arrival into ZZZ; Center informed us that the airport operations was currently in the process of sweeping the runway and would be done by the time we arrived. We were given a Field Condition report by the dispatcher of 3/3/3 that was on 20 minutes old at the time of receipt. The Captain (CA) was monitoring CTAF and heard the trucks report they were clear of the runway shortly before we arrived. On landing we discovered that the braking report of 3/3/3 was inaccurate and braking was nil. I attempted to use brakes along with thrust reverses but could feel the wheels were sliding. Soon the nose started to depart the center line as we were trying slow the airplane. The CA took over the controls in an effort to try to get us back to center line but the plane kept on its course towards the edge of the runway. As we approached the edge the aircraft finally started to turn back to the right but the airplanes momentum carried it into the grass. We departed the runway approximately 6500 feet down the runway to the left side going into the grass about 30 feet at an angle.Threats included the deteriorating weather conditions that was occurring. We were monitoring a potential overweight landing situation. The braking report we were given was already almost 30 minutes old by the time we received it. The airplane sliding on the snow was the undesired aircraft state that we were trying to overcome.In looking back I feel the captain and I did everything we could have. I had briefed that I was going to use maximum thrust reverse to assist in slowing the aircraft in case the runway was slippery. We were going off a braking report of 3/3/3 that we felt was still accurate. Center had advised us the trucks were on the runway clearing the snow and they would be off by the time we got there. The CA heard the trucks report on the CTAF they were clear of the runway so we felt that it would be cleared better than it was. When we landed and realized the braking was nil and the plane started to depart center line the CA took controls and tried to do everything he could to get the airplane to return to center line and stop before we went into the grass.

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.