Plans to test Hartsfield-Jackson Atlanta International Airport’s emergency lighting system are back on this week after officials scrubbed their original schedule last week because of July Fourth passenger volumes.

The tests, which will affect lighting, escalators, elevators and major terminal systems like baggage claim, are set to happen between the hours of 11:59 p.m. and 2:30 a.m. on the following dates:

  • Tuesday, July 8
  • Wednesday, July 9
  • Monday, July 14
  • Tuesday, July 15

The testing is part of a long-term effort to upgrade the airport’s electrical systems and “achieve 100% electrical resilience.”

They will be postponed in case of “irregular airport operations,” according to a new release.

Since a disastrous 2017 power outage that shut Hartsfield-Jackson down for 11 hours, the airport has been working toward building an entire redundant power system.

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When Hartsfield-Jackson Atlanta International Airport reschedules its overnight power outage tests, the main security checkpoint at the domestic terminal will be closed between 11:59 p.m. and 2:30 a.m. Travelers are instructed to use the north checkpoint instead. (Arvin Temkar/AJC)

Credit: arvin.temkar@ajc.com

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Scott Jackson (right), business service consultant for WorkSource Fulton, helps job seekers with their applications in a mobile career center at a job fair hosted by Goodwill Career Center in Atlanta. (Ziyu Julian Zhu/AJC)

Credit: Ziyu Julian Zhu/AJC