The Magpies coach was livid after a wrong decision by the referee’s assistant in his team’s 2-1 win over Tottenham on Saturday, and pushed the official with one hand in protest.
Pardew was banished to the stands for the act, before the governing body charged him with misconduct and asked him to respond.
The Tyneside outfit’s boss is now facing a ban, after admitting guilt over the incident.
“We have to do the procedure that has to take place and we are following that through,” he told reporters, published by Sky Sports.
“We are doing a letter on my call on what I thought happened at the weekend.
“But we have pleaded guilty and we will go to see the FA and see what punishment is going to come to fruition.”
By Gareth McKnight