Date: 201901
Local time of day: 0001-0600
Location: ZZZ.Airport, US
Flight conditions: Mixed
Weather elements / visibility: Snow; 1
Light: Daylight
Aircraft: B737 Undifferentiated or Other Model
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Landing
ATC / advisory: Tower ZZZ
Reporter organization: Air Carrier
Reporter function: Captain; Pilot Flying
Reporter qualification: Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Second reporter function: First Officer; Pilot Not Flying
Anomaly: ATC Issue All Types; Ground Event / Encounter Loss Of Aircraft Control; Ground Excursion Runway
Detector: Person Flight Crew
When detected: Taxi; In-flight
Result: Flight Crew Regained Aircraft Control; General Evacuated
Contributing factors: Airport; Human Factors; Weather
Primary problem: Weather

Narrative: While on IOE (Initial Operating Experience); first landing attempt with Company; the First Officer made a normal and successful IFR ILS Approach and landing. The RCC (Runway Condition Code) received was 6-DRY GOOD; and weather reported winds 040/9; Vis 1 NM -FZDZSN BR; 600 overcast; temp -5/-7 and landing XXR/L. During the approach; Tower directed the flight to depart at the end of the runway. Discussion included the type of approach and confirming the RCC for the runway via ACARS. After landing; handoff of the aircraft was completed and while taxiing less than 20 knots (est.) and approaching the departure end of Runway XXR; brakes were applied with no effect including control input using the tiller. Prior to pavement departure; the nose wheel was centered and the aircraft came to rest right of the overrun in the grass. Notifying Ground Control of the situation; coordination proceeded for rescue though both the Tower and Company Ops. The FAs (Flight Attendants) and [all] Passengers were notified of the situation; remaining in their seats until further information was available. Dispatch and Chief Pilot were contacted. Engines were shut down following APU start; and with Maintenance concurrence; the CVR (Cockpit Voice Recorder) circuit breakers were pulled and documented in the logbook.With outstanding support from Rescue; deplaning began using the Captain side rear entrance after deicing a path; [in groups of passengers] at a time due to shuttle size. Five shuttles were eventually used for the transportation making round trip runs. The aircraft shutdown checklist was accomplished and the Crew left last; after inspecting the aircraft for remaining passenger items. No injuries reported during the event. One oversight was not completing the logbook oil and fuel entry prior to leaving the aircraft.


Second narrative: [We] flew to ZZZ and was on time. After landing (executed by the First Officer); the aircraft slowed as expected with normal speedbrake extension and thrust reverser deployment. At approximately 60 knots; transfer of control was performed from the FO (First Officer) to the Captain. Just prior to an expected turn off at either Runway XY or Taxiway X; instructions from Tower were received to 'taxi to the end'. By that point; aircraft had slowed and had to complete a long taxi to the end of the runway. Approaching the end of the runway; the Captain began the turn to Taxiway Y; but the aircraft did not respond to brake or tiller inputs and slid into the grass at the intersection of Runway XXR and Taxiway Y. Of note is the fact that braking action at the airport had been reported by ATIS as 6. The runway appeared to have good braking until the very end.The only thing that could have prevented this was for airfield management to report possible icing conditions on other parts of the airfield.


Synopsis: B737 flight crew reported a runway excursion while exiting the runway in poor weather with runway condition erroneously reported to them as 6-dry.