A319 flight crew reported wet runway and differential power on initial power advancement resulted in momentary loss of control and rejected takeoff.
Synopsis
A319 flight crew reported wet runway and differential power on initial power advancement resulted in momentary loss of control and rejected takeoff.
Narrative
Tower cleared us for takeoff and cleared us for backtrack on RWY XX at ZZZ. We entered the runway and made a left hand 180 for the lineup. After engines stabilized; power was increased toward TOGA power for takeoff and the aircraft began to veer left of centerline. A reject was called and performed just a few seconds after power push. Brakes were applied and control of the aircraft was achieved quickly. We taxied clear of the runway and all systems looked normal. Reject was performed below 20kts and we worked with tower for a second departure. We performed appropriate checklists and requested takeoff clearance again. We did another backtrack and lineup for RWYXX. We departed without incident.Our recommendation is to closely monitor engine thrust as power is advanced to takeoff setting. Always be ready to perform a reject and not become complacent. The majority of takeoffs are performed without incident and when something does go awry the startle factor could delay actions. The decision to reject a takeoff quickly helps to manage a situation that could get out of hand.
Second reporter narrative
On power advance for takeoff the aircraft started to veer to the left. Full right rudder was not sufficient to maintain centerline. Vocalized to the captain and he called reject at about 20 knots. Aircraft cleared the runway without further incident. Wet runway and one engine spooling up significantly faster than the other. Correct procedures were applied and resulted in a low speed reject before any significant runway deviation could occur.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.