The latest alarming outage was just before 4 a.m. and lasted roughly 90 seconds, the Federal Aviation Administration (FAA) told The Post.

“There was a telecommunications outage that impacted communications and radar display at Philadelphia TRACON Area C, which guides aircraft in and out of Newark Liberty International Airport airspace,” an FAA spokesperson said.

Audio transmissions captured air traffic controllers alerting at least two incoming planes that the radar screens had gone dark.

In one recording, a controller could be heard telling a private jet en route from Cyprus that it should stay above 3,000 feet in case they lost touch during the descent.

Another controller was also reportedly overheard telling a FedEx pilot about the blackout issue.

It comes as the Garden State airport continues to be plagued by flight delays and cancellations following the earlier saga that saw air traffic controllers lose communications with planes in the sky for at least 30 seconds on April 28.

The FAA was quick to blame that meltdown on the physical failure of a telecommunications line, as well as a shortage of air traffic controllers at the airport and runway construction.

The agency has vowed to accelerate fixes at the airport, including upgrading elements of the air traffic control operation.

The Philadelphia-based facility relies on radar data sent over lines from New York that may have failed, including some old copper phone lines.

The feds plan to replace those old wires with fiber optic cables and add three new data lines between New York and Philadelphia as part of the fix, as well as work to get additional controllers trained and certified.

It wasn’t immediately clear how long the upgrades would take.