TOKYO (AP) — A transcript of communication between traffic control and two aircraft that collided and burst into flames at Tokyo’s Haneda Airport showed that only the larger Japan Airlines passenger flight was given permission to use the runway where a coast guard plane was preparing for takeoff.

An orange fireball erupted from both aircraft on Tuesday evening as the JAL flight 516 continued down the runway covered in flames and spewing gray smoke. Within 20 minutes, all 379 passengers and crew members slid down emergency chutes and survived. The pilot of the coast guard plane — a Bombardier Dash-8 — evacuated with injuries but five crew members were killed.

The Transport Ministry on Wednesday released a transcript of air traffic control communication of about 4 minutes and 25 seconds just before the crash. It showed no clear takeoff approval was given to the coast guard plane. According to the text, the Tokyo air control gave the JAL Airbus A350 permission to land on Runway C, noting that there is a departing plane, with the JAL pilot repeating the instruction.

The coast guard plane said it was taxiing to the same runway, and the traffic control instructs it to proceed to the stop line ahead of the runway. The controller noted the coast guard gets the departure priority, and the pilot said he was moving to the stop line.

Their communication in the script ends there. Two minutes later, there was a three-second pause, apparently indicating the time of the collision.

Police began a separate probe into possible professional negligence. Tokyo police said that investigators examined the debris on the runway and were conducting interviews. They said 17 JAL passengers were slightly injured.

The JAL plane had flown from Shin Chitose airport near the northern city of Sapporo, and the coast guard Bombardier was preparing to depart for Niigata to deliver relief supplies to the central regions hit by powerful earthquakes on Monday that killed more than 60 people.

On Wednesday, six experts from the Japan Transport Safety Board examined what remained of the aircraft, the board said. TV footage showed the severely damaged A350’s wings among the charred, broken parts of fuselage. The smaller coast guard plane resembled a mound of rubble. Board investigator Takuya Fujiwara said his team recovered flight data and voice recorders from the Bombardier for analysis.

Investigators plan to interview the pilots, officials as well as air traffic control officials to find out how the two planes simultaneously ended up on the runway, JTSB said.

The two sides had different understandings of their permission to use the runway.

The fire is likely to be seen as a key test case for airplane fuselages made from carbon-composite fibers — featured on the A350 and the Boeing 787 — instead of conventional aluminum skins.

“This is the most catastrophic composite-airplane fire that I can think of. On the other hand, that fuselage protected (passengers) from a really horrific fire — it did not burn through for some period of time and let everybody get out,” safety consultant John Cox said.

Tuesday’s accident was the first severe damage to an Airbus A350, among the industry’s newest large passenger planes. It entered commercial service in 2015. Airbus said in a statement it was sending specialists to help Japanese and French officials investigating the accident, and that the plane was delivered to Japan Airlines in late 2021.

JAL operates 16 of the A350-900 version aircraft, according to its website. The twin-engine, twin-aisle A350 is used by a number of long-haul international carriers. More than 570 of the aircraft are in operation, according to Airbus.