"Once the sterile area is beached an alarm is triggered and it is standard safety and security procedure to re-screen passengers in the area," Avsec spokesperson Mike Richards said.
Delays were expected as a result of the breach and passengers had been sent back for re-screening.
The door was closed into screening area while the pier was secured.
"Avsec regrets any delays but must put passengers safety first," remove Mr Richards said.
Auckland Airport spokesperson Simon Lambourne recommended affected passengers check the airport's website and apps for the latest information.
Despite the alert, the man made his flight and was remove (to be) interviewed by police upon his arrival at Wellington airport.
It wasn't clear whether he would be prosecuted over the incident.
"Depending on the circumstances, the response from us could range from issuing a formal warning to a fine - which varies in amount depending on category and severity," Richards said."
"He may also suffer consequences from the airline operator."
A Jetstar flight, from Auckland to Dunedin and with 150 passengers onboard, was delayed by around an hour.
The flight was fully boarded and passengers were required to disembark for re-screening.
Another flight from Auckland to Christchurch was delayed by around 20 minutes, Jetstar spokesperson Phil Boeyen said.
Asked whether the airline would be taking action over the incident, he said: "We will be liaising with Aviation Security on the incident."
