Investigators: Utah firefighter Matt Burchett died after retardant drop on California fire

Matt Burchett's last Instagram posts were of work on the Mendocino Complex fire in California, one of the largest fires in that state's history. (Photo: Matt Burchett via Instagram)

SACRAMENTO, Calif. (AP) — A firefighter died last week from falling tree debris after thousands of gallons of retardant were dropped on the area where he was helping battle California's largest-ever wildfire, according to a preliminary report from investigators.

The summary report by California fire officials says Battalion Chief Matthew Burchett was struck by debris on Aug. 13 at the Mendocino Complex Fire. Three other firefighters had minor injuries.

Funeral services for the 42-year-old Burchett were held Monday in his home state of Utah. He is survived by a wife and 7-year-old son.

The two-paragraph summary calls for an immediate corrective action, saying firefighters must remain clear of areas with overhead hazards during a retardant drop.

"That is what we're trained to do," said Scott McLean, a spokesman for California's firefighting agency. "Look up, look down, look around."

He and other spokesmen could not say what went wrong in this case, citing the ongoing investigation. That includes disclosing the type of aircraft involved, why the four firefighters were underneath, or even if all four firefighters were from the same unit.

Cliff Allen, president of the union representing state wildland firefighters, said he understood investigators were still conducting interviews. But he said fire supervisors should have made sure the firefighters were well clear of the drop zone or that their positions were clearly marked for the air tanker pilot and the pilot of the lead planes that guide in the huge aircraft, showing them where to go and when to start and stop slurry drops.

There could have been a radio miscommunication or the crew may not have heard or chose to ignore the radio warning, he said. He cautioned that it's not clear from the preliminary report whether the tree was weakened from the fire or from the retardant drop, or if the firefighters were hit by fire retardant slurry, which is a mixture of water, fertilizer and red dye.

"Anytime you're working in trees, you have trees that are fire weakened, then strong winds or water or retardant drops could potentially cause them to fall and possibly injure folks," he said. "It's often referred to as 'widow makers.'"

Modified DC-10s can drop 12,000 gallons (45,424 liters) of slurry, 12 times the amount carried by the standard smaller air tanker used by the California Department of Forestry and Fire Protection. It can lay a swath of fire retardant as wide as a football field for as long as a mile.

CalFire says the modified 747 can drop 24,000 gallons, double that of the DC-10. It uses a system that can release the slurry under pressure or as gently as falling rain from an altitude as low as 400 feet (122 meters).

Firefighters who can't get out of the way are trained to lie face down toward the oncoming aircraft, helmet on, chinstrap secured, one hand holding the top of the helmet as it takes the brunt of the impact, McLean said. The firefighter's legs should be spread to provide stability, because the force of the falling slurry and the air turbulence can otherwise lift a firefighter off the ground.

"If you're in that particular area and you can't leave, you want to get to a safe position," McLean said.

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