The final words of the pilot whose plane crashed into a Philadelphia neighbourhood has been captured on air traffic control audio. The medical transport jet carrying a child patient, her mother and four others crashed 30 seconds after taking off, killing all on board.

The crash took place shortly after 6pm local time on Friday and was captued by multiple cameras. The footage shows the plane erupting into a fireball and engulfing several homes in flames.

Now, an audio recording between the pilot and a local radio tower has been released showing what took place moments before the fatal crash. In the clip, the local air controller is heard establishing contact with the pilot, telling him to the Philadelphia Terminal Radar Approach Control Facility.

The pilot quickly reponds, saying something inaudiable at first before ending with: "Thank you. Good day". The control tower then tries to re-establish contact but is met with several second of silence. 

Air traffic tries again and pleads with the pilot to respond. At one point he even asks if the flight was "on frequency". The clip then hears from a pilot from a separate plane asking what had happened on runway two.

Radio control responds saying they had a "lost aircraft".

The controller is heard saying: "We're not exactly sure what happened, so we're trying to figure it out for now."

According to CNN, the incident took place as the local air controller was handing the flight over to the Philadelphia Terminal Radar Approach Control Facility.

The Facility was meant to work the plane up to a higher altitude. The Learjet 55 crashed near Roosevelt Mall in Pennsylvania.

Doorbell and dashcam videos captured the moment the aircraft hit the ground and burst into flames, killing six passengers including a sick young girl who had been travelling with her mother after being treated at Pennsylvania’s Shriner’s Children’s Hospital.

It vanished from radar after climbing to around 1600ft before plummeting down to earth in a populated area of Northeastern Philadelphia near the Roosevelt shopping mall. Secretary Sean Duffy of the Department of Transportation said the jet hit a gas pipeline, causing an explosion and fires that spread to three buildings.

Authorities evacuated a nearby car park following the blaze and roads have also been closed surrounding the site of the crash.

Jet Rescue Air Ambulance confirmed that all six people on board - four crew members and the patient and her mother - had all died in the crash. All those on board were from Mexico, where the air ambulance firm, which operates internationally, is also based. 

Locals described the ensuing scene as similar to a war zone, with limbs scattered across the road and rows of houses also erupting in flames. Pieces of wreckage including a medical oxygen tank have been found at least a quarter mile away from the incident site.