• Aerial firefighting firms are repurposing passenger airliners into flying fire trucks as the intensity of forest and wildfires grows each year.
  • Aging aircraft like the Boeing 747 and McDonnell Douglas MD-80 are finding new purpose in the dangerous task.
  • Passenger seats are removed and thousand-gallon tanks are being installed to carry water or fire retardants.
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Forest and wildfires are worsening every year, according to NASA, and battling them is no easy task. The blazes can decimate millions of acres and reduce lush green forests to smoldering piles of ash in a matter of weeks.

While firefighters do what they can from the ground, they’ll often call for air support in the form of aerial tankers, assisting the effort by bombarding the infernos from above with water or fire retardant. It’s a dangerous task but one that’s giving some retired airliners a second-life beyond carrying passengers or freight.

Very few planes are built with firefighting in mind so firms are taking the aging aircraft that have been abandoned by the airlines and repurposing them to stop fires and ultimately, save lives and property. And unlike the current trend in the airline industry, the bigger the jet the better.

The Boeing 747, for example, that once held the title of the world’s largest passenger airliner until the A380 came around now holds the title of the world’s largest firefighting aircraft. There’s only one in existence and its seen action all over the world, making good use of its massive frame that now stores water tanks instead of passengers.

But it's not an easy task as fighting fires requires the aircraft - and the pilots flying them - to get up close and personal with the deadly blazes.

Take a look at why former passenger aircraft are critical to stopping fires.


This Boeing 747 is the world's largest aerial firefighting plane.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: Joe Amon/The Denver Post/Getty

Known as the Global Supertanker, this jet has fought fires around the world. Most recently, it's been fighting wildfires in California.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: Joe Amon/The Denver Post/Getty

Source: 9News Colorado


The Boeing 747 is normally known for its superior passenger capacity but the Global Supertanker's capacity isn't measured in seats, but gallons.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: Joe Amon/The Denver Post/Getty

The passenger compartment of the Jumbo Jet has been stripped of all seats and massive tanks have been installed in its place.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: Joe Amon/The Denver Post/Getty

Stretching nearly the length of the aircraft, the tanks can hold 19,200 gallons of water or fire retardant.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: Joe Amon/The Denver Post/Getty

Source: 9News Colorado


Here's the command station where a crewmember – much like a bombardier on a warplane – will activate the drop.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: Joe Amon/The Denver Post/Getty

The contents of the tanks will then flow out of these ports on the aircraft's belly.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: Joe Amon/The Denver Post/Getty

Here's what it looks like in action.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: JOSH EDELSON/AFP/Getty

The red chemical is a fire retardant that's often applied to the edges of a blaze to contain the spread.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: DAVID MCNEW/AFP/Getty

This particular Boeing 747 has had a long life that's taken it around the world, even before it began fighting fires.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: Joe Amon/The Denver Post/Getty

It flew for Japan Airlines and then for Evergreen International Airlines as a cargo freighter.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: Joe Amon/The Denver Post/Getty

Source: Planespotters.net


The cockpit is no different, except for one minor feature not found on the passenger or cargo variants...

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: Joe Amon/The Denver Post/Getty

This "emergency dump" switch that jettisons the contents of the tanks.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: Joe Amon/The Denver Post/Getty

Other than that, it looks like a normal Boeing 747 from the outside with no indication that it's actually a flying fire truck.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: Joe Amon/The Denver Post/Getty

The casual observer might even confuse its red and white colors for the Boeing house livery found on its Boeing 747-8i during testing.

Foto: A Boeing 747-8i during a test flight. Source: MARK RALSTON/AFP/Getty

It's the flagship and sole aircraft of the Global Supertanker Services fleet, based in Colorado Springs, Colorado.

Foto: A Boeing 747 aerial firefighting aircraft known as the Global Supertanker. Source: DAVID MCNEW/AFP/Getty

Source: 9News Colorado


But it's not the only former passenger jet enjoying a new lease on life as a firefighter as the Boeing 737 has also found its calling in the field.

Foto: A Coulson Aviation Boeing 737-300 Fireliner aerial tanker. Source: Coulson Aviation

Source: Coulson Aviation


Coulson Aviation operates six Boeing 737-300 Fireliners, some of which formerly flew for Southwest Airlines.

Foto: A Coulson Aviation Boeing 737-300 Fireliner aerial tanker. Source: Coulson Aviation

Source: Coulson Aviation and Planespotters.net


The jet primarily sees action in North America and Australia, with the latter experiencing devastating wildfires in the past year.

Foto: A Coulson Aviation Boeing 737-300 Fireliner aerial tanker. Source: PETER PARKS/AFP/Getty

Source: Chek News Canada


Also in the Coulson Aviation fleet are Lockheed Martin C-130 Hercules aircraft.

Foto: A Coulson Aviation Lockheed Martin C-130 Hercules aerial tanker. Source: Ryan Fletcher/Shutterstock.com

Source: Coulson Aviation


The four-engine turboprops are most commonly used by the world's militaries for cargo and troop transport.

Foto: A Coulson Aviation Lockheed Martin C-130 Hercules aerial tanker. Source: Ryan Fletcher/Shutterstock.com

It can carry up to 4,000 gallons of water or fire retardant in its tanks while having an advantage of its jet counterparts in that it can access remote locations and utilize unpaved runways.

Foto: A Coulson Aviation Lockheed Martin C-130 Hercules aerial tanker. Source: Ryan Fletcher/Shutterstock.com

Source: Coulson Aviation


A Coulson Aviation C-130 was involved in a fatal accident in January 2020 while fighting fires in Australia, showing how dangerous the task can actually be.

Foto: A Coulson Aviation Lockheed Martin C-130 Hercules aerial tanker. Source: SAEED KHAN/AFP/Getty

Source: Aviation International News


One of the more unique planes in the Coulson fleet is the Martin Mars, a World War II-era flying boat used by the US Navy.

Foto: A Coulson Aviation Martin Mars flying boat aerial tanker. Source: Kim D. Lyman/Shutterstock.com

Source: Coulson Aviation


The four-engine piston plane would collect water by skimming lakes, with tanks being able to collect 7,200 gallons in under a minute.

Foto: A Coulson Aviation Martin Mars flying boat aerial tanker. Source: Serjio74/Shutterstock.com

Source: CNN


China just built a similar aircraft with plans to also use it to fight fires.

Foto: The AVIC AG600 Kunlong floatplane. Source: Xinhua/Li Ziheng/Getty

Read More: The world's largest floatplane that looks like remarkably like Howard Hughes' Spruce Goose just completed its first sea trial in China - take a look


As of 2016, however, they're for sale, with the going rate starting at $3 million.

Foto: A Coulson Aviation Martin Mars flying boat aerial tanker. Source: Shutterstock.com

Source: CNN


Other former passenger liners taking to the skies including the McDonnell Douglas DC-10, once a staple for the likes of Delta Air Lines, Continental Airlines, and American Airlines.

Foto: A 10 Tanker McDonnell Douglas DC-10 aerial tanker. Source: Justin Sullivan/Getty

New Mexico's 10 Tanker operates the fleet of four tri-engine DC-10s that can carry 9,400 gallons of fire retardant.

Foto: A 10 Tanker McDonnell Douglas DC-10 aerial tanker. Source: JOSH EDELSON/AFP/Getty

Source: Tanker 10


The jet was fighting fires most recently in California and Arizona in July.

Foto: A 10 Tanker McDonnell Douglas DC-10 aerial tanker. Source: Justin Sullivan/Getty

Source: 10 Tanker


Another American workhorse, the McDonnell Douglas MD-80 series aircraft, has also been contributing to the effort.

Foto: An Erickson Aero Tanker McDonnell Douglas MD-87 aerial tanker. Source: Mark Rightmire/Orange County Register/Getty

The Long Beach-built aircraft arrived in Oregon – flying for Erickson Aero Tanker – after careers flying passengers for the likes of Iberia, Scandinavian Airlines, and Japan Airlines, among others.

Foto: An Erickson Aero Tanker McDonnell Douglas MD-87 aerial tanker. Source: Randy Miramontez/Shutterstock.com

Source: Planespotters.net


The medium-haul T-tail jets can also hold 3,000 gallons in their holds.

Foto: An Erickson Aero Tanker McDonnell Douglas MD-87 aerial tanker. Source: Randy Miramontez/Shutterstock.com

Source: Erickson Aero Tanker


All the jets – large and small – often have to fly very low to effectively drop their payload and frequently find themselves less than 500 feet above the ground when doing so.

Foto: An Erickson Aero Tanker McDonnell Douglas MD-87 aerial tanker. Source: Mark Rightmire/Orange County Register/Getty

It's no easy task but necessary to save lives.

Foto: An Erickson Aero Tanker McDonnell Douglas MD-87 aerial tanker. Source: Mark Rightmire/Orange County Register/Getty