One of Brisbane's busiest airport hangars has opened to the public to allow aviation enthusiasts to see what happens inside.

Hangar 6 at Archerfield Airport houses CareFlight Rescue, a not-for-profit aero medical charity.

The Brisbane base is used to maintain, repair and clean the helicopters CareFlight uses throughout the state — and now the public is being offered the chance to see engineers working behind the scenes.

CareFlight spokeswoman Chris Bruhn said the tours aimed to give people a unique view of its operations.

"It's part of a big project for our volunteer program which stretches to Toowoomba and the Gold and Sunshine Coast," she said.

"The volunteers learn to be tour guides and bring people through our hangar.

"And it's an interesting thing to do."

Ms Bruhn said the public would also be able to learn about the history of the hangar and the operations of CareFlight.

Hangar 6 and the nearby hangars played an important role during World War II when the airport was used as a Royal Australian Air Force station.

Archerfield has been a key location for Brisbane's aircraft industry since the 1930s. ( Wikipedia )

"It's an amazing site," Ms Bruhn said.

"We have 11 full-time engineers here with a couple of apprentices, and it's a really clean facility.

"There is so much going on and the guys know where everything goes out and back in on the helicopters."

The base is used to maintain, repair and clean the helicopters used by CareFlight. ( 612 ABC Brisbane: Terri Begley )

Engineer Ben Bizainhout said visitors often asked about where the paramedics and doctors came from.

"Our main aim has been to explain what the facility means for the community and what we do in the facility," he said of the tours.

"All the heavy maintenance that isn't done in the remote bases is done right here in Brisbane and I don't think people realise that.

"We're in a closed hangar most of the time so when we have groups come in it's nice to see them and answer their questions.

"People also often ask about how much it costs, and how often and frequent are the inspections carried out."

Tour guide Abe Hyslop teaches visitors about what happens in Hangar 6. ( 612 ABC Brisbane: Terri Begley )

Coolangatta volunteer Abe Hyslop travelled to Brisbane to act as a guide.

"The background of how the crew work and what they do, as well as how they gain funds, is really interesting," he said.

"People want to know how the staff perform the important duties they do each day too."