Date: 202102
Local time of day: 1801-2400
Location: DFW.Airport, TX
Weather elements / visibility: Icing
Aircraft: A319
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Takeoff / Launch
ATC / advisory: Tower DFW
Reporter function: First Officer; Pilot Not Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Human factors: Human-Machine Interface
Second reporter function: Captain; Pilot Flying
Anomaly: Ground Event / Encounter Loss Of Aircraft Control; Ground Event / Encounter Weather / Turbulence
Detector: Person Flight Crew
When detected: Taxi
Result: Flight Crew Regained Aircraft Control; Flight Crew Returned To Gate
Contributing factors: Human Factors; Weather
Primary problem: Weather

Narrative: After deicing the aircraft we taxied to [Runway] 35L. Upon completion of all of our checklists we requested time on the runway to do a 30 second engine run-up for the A319. [Runway] 35L had just been plowed of snow before our taxi onto the runway. The Captain was the Pilot Flying and began to increase the thrust. At about 55% N1 the airplane began to slide and point away from centerline. The Captain tried to steer the airplane using the tiller with great difficulty. The aircraft rolled forward about 1;000-1;500 ft. I called Tower and notified them that we had a steering problem and requested to exit the runway. We decided to return to the gate to have the aircraft nose wheel inspected. The runway; although recently plowed; played a significant factor in our situation. Also; the recommended 70% N1 engine run-up per our [Operating Manual] is a lot of power to control in icing conditions on the ground. I think that the engine run-up procedure approved by Airbus can lead to very problem when operating on surfaces during icing conditions.


Second narrative: After deicing we were cleared to lineup and wait on 35L and to conduct our engine run up. I ran up both engines symmetrically to 70% N1 [following the SOP]. It was then that the right main gear lost traction and the aircraft turned aggressively to the left. I immediately retarded both throttles to idle and used nose wheel steering to regain the centerline. There was nose wheel scrubbing felt. I then cleared the runway and returned to the gate for a maintenance inspection of the nose wheel. The factors were the unprecedented DFW weather. Although the runway was freshly cleaned and we were the first aircraft to use it. There was obviously ice in spots that were hard to see at night. The light takeoff weight of 116;000 lbs coupled with the high power setting for the run up played roles in the incident. Although I had operated two previous flight in and out of DFW that day the runway conditions changed rapidly. I felt that the runway had been freshly cleaned moments before I took to the runway and that it would be suitable for the run up. I will continue to be vigilant in inclement weather conditions. I have gained a newer understanding for the power of the engine on an A319.


Synopsis: A319 flight crew reported experiencing momentary loss of aircraft control during the initiation of takeoff roll due to ice on the runway.