The officers with the Port Authority Aircraft Rescue Fire Fighter Unit had been responding to a separate aircraft emergency in Truck 1 when they were instructed to cross Runway 4 at the same time the Air Canada flight was cleared to land on the same runway.

“As Truck 1 started crossing the runway, it was struck by Air Canada Flight 8646,” the Port Authority Police Benevolent Association said in a statement on Monday.

“The tragic crash occurred in view of the other ARFF Units. The members of those units immediately went into rescue operations evacuating the passengers, securing their safety while not knowing if their fellow officers in Truck 1 were dead or alive. True professionalism,” the PBA wrote in a statement.

The devastating collision killed two pilots, Antoine Forest and Mackenzie Gunther, and injured a Port Authority police officer and a sergeant who were in the truck. Several passengers who were hurt were taken to the hospital, and most were released by Monday morning.

The Port Authority police officer and sergeant are now in stable condition, according to authorities.

“We hope for their complete recoveries,” the PBA wrote.

Gunther was the first officer alongside pilot Antoine Forest on Air Canada Express Flight 8646 when it collided with a Port Authority fire truck just after landing around 11:40 p.m., Radio-Canada reported.

The two pilots died when the Port Authority cops were cleared to drive their fire truck across the runway — at the same time that the Air Canada jet had been given the go-ahead to land on the same runway.

Roughly 40 of the 70 passengers and surviving crew members were taken to the hospital, with many suffering only minor injuries. Most victims were released by Monday morning.

The pilots worked for Jazz Aviation LP, which was operating as Air Canada Express, according to the company.

The LaGuardia Airport runway where an Air Canada Express jet collided with a fire truck en route to another emergency is expected to be closed for days as officials work on clearing the “tremendous” amount of debris, officials said.

Runway 4 and “other areas” nearby are still covered in plane debris and “hazardous materials” linked to the wrecked fire truck, Jennifer Homendy, chairwoman of the National Transportation Security Board, told reporters Monday.

It’s unclear when the taxiways will be fully opened. Homendy warned it could take days.

The cockpit audio recorder inside the Air Canada Express jet that plowed into a fire truck Sunday evening was recovered unscathed, officials said.

The cockpit vocal recorder and the flight data recorder were both obtained from the wreckage of the Air Canada Express jet, National Transportation Security Board Chairwoman Jennifer Homendy confirmed Monday evening.

Both were sent to the NTSB’s office in Washington, DC, for review. Officials will begin analyzing the vocal recorder tomorrow, Homendy said.

It’s unclear whether the flight data recorder was damaged.

A hole had to be cut in the plane’s roof to access the voice recorder, Homendy said, noting there is still a “tremendous amount of debris” scattered across the runway.

Investigators with the National Transportation Security Board’s team probing the deadly Sunday night crash at LaGuardia Airport are still working to reach the scene as many struggle to inch through ever-growing security lines at airports.

Jennifer Homendy, the chairwoman of NTSB, told reporters Monday evening that members of their investigation team are still en route, so they weren’t able to mark “a full day of investigation” on site yet.

Dozens of staffers from across the NTSB, including 25 specialists, are being brought to the Queens airport to investigate the harrowing crash, which left two pilots dead and more than 40 injured.

One of their air traffic control specialists was stuck waiting in a security line at a Houston airport for a whopping three hours, and was only fast-tracked through after NTSB called to “beg to see if we could get her through so we can get her here,” Homendy said.

Scores of TSA workers have called out after going more than a month without a full paycheck amid the partial government shutdown.

President Trump dispatched Immigration and Customs Enforcement agents to supplement the missing TSA officers, but wait times at airports across the country are still climbing.

The LaGuardia plane crash probe could end up focusing at least partly on how much the firetruck driver could see at the time, an aviation expert told The Post.

Dan Rose, an aviation lawyer and veteran military pilot, suggested that the NTSB will be looking into the truck operator’s view “down the runway” — namely, if the driver could see the approaching jet.

“There probably wasn’t a whole lot that [the fire truck crew] could have done, but the visibility aspect is really what I’m suggesting with respect to the fire truck, and see if there were any environmental or lighting conditions that made it hard to, for instance, see the aircraft coming down the runway,” Rose said.

FAA Administrator Byran Bedford told reporters Monday that the weather at the time of the crash included moderate winds, rain and fog, with visibility of about 4 miles.

Rose said persistent air-traffic-controller staffing issues across the country would likely be put in the spotlight, as well.

“This has been an ongoing issue for air traffic control over the decades. The air traffic controllers are very well-trained and very professional 99.9% of the time,” he said. “They have a very difficult job, and understaffing, or not providing the most current and available technology, is only making their job harder.”

The Port Authority officers inside the fire truck that was hit by the Air Canada Express jet Sunday night both survived and are being treated at a hospital.

The two pilots in the plane died.

The National Transportation Safety Board, which is investigating the deadly crash, will provide an update at 6 p.m. at LaGuardia Airport.

US Transportation Secretary Sean Duffy denied a “rumor” that only one air traffic controller was in the tower at the time of the LaGuardia Airport crash — but wouldn’t provide any additional details.

“I’ve heard the rumor that there was only one, one controller in the tower, and that is, that’s not accurate,” he told reporters.

He noted the Queens airport has 37 air traffic controller positions, 33 of which are currently staffed, with seven others in training.

“So as far as airports go, LaGuardia is a very well-staffed airport. We’re a couple controllers short in total, but it is a well-staffed airport,” Duffy insisted.

He punted additional inquiries to the National Transportation Safety Board, which is investigating Sunday night’s deadly crash.

Mayor Zohran Mamdani lauded the survivors of the Air Canada Express crash at LaGuardia Airport, saying their quick-thinking actions likely prevented further injuries.

“I also want to commend those who were thrust into a frightening accident and reacted not only with composure, but by extending a hand to the person next to them,” Mamdani said at a press conference at the Queens airport Monday.

Mamdani said that passengers opened the emergency door and “helped one another off the plane” while waiting for first responders. Others focused on helping the shell-shocked survivors remain calm.

Seventy-two passengers and a full crew were on the New York-bound Air Canada flight, which took off from Montreal Sunday night.

The plane plowed into a fire truck head-on, crushing the cockpit in the process, and killing both pilots.

The names of the two Port Authority police officers injured in LaGuardia’s deadly plane crash were released Monday — as both recovered in the hospital.

Officers Adrian Baez and Michael Orscillo were the only people inside a fire truck that was crossing the runway when an Air Canada Express jet was landing and crashed into it.

One officer was set to be released sometime Monday afternoon, authorities said. The other will be kept in the hospital overnight, said Executive Director of the Port Authority Kathryn Garcia.

The officers’ injuries were not immediately clear.

The cops were responding to a separate emergency situation with a United Airlines flight when the Air Canada Express touched down on the taxiway, ramming into their fire truck, obliterating the cockpit and sending one flight attendant flying out of the plane.

Both of the jet’s pilots were killed. Dozens of passengers and crew members were injured, though many have since been released from the hospital, officials said.

The weather during LaGuardia Airport’s deadly runway crash Sunday included moderate winds, rain and fog, with visibility of about 4 miles, FAA Administrator Bryan Bedford told reporters Monday.

“We had broken ceilings at 9,000 feet … in raining conditions, so there was mist and fog here,” Bedford said.

He did not say whether the weather may have played any kind of role in the crash.