HomeNewsArticle Display

AFRL discovering what’s “bugging” military aircraft

AFRL Biological Materials and Processing Research Team members perform sample tests of various aircraft locations at the conclusion of the Joint Biological Agent Decontamination System process.  (U.S. Air Force photo)

Air Force Research Laboratory biological materials and processing research team members perform sample tests of various aircraft locations at the conclusion of the Joint Biological Agent Decontamination System process. (U.S. Air Force photo)

The AFRL Biological Materials and Processing Research Team collects fuel samples from a storage tank to analyze for potential biocontamination.  (U.S. Air Force photo)

The Air Force Research Laboratory biological materials and processing research team collects fuel samples from a storage tank to analyze for potential biocontamination. (U.S. Air Force photo)

WRIGHT-PATTERSON AIR FORCE BASE, Ohio (AFNS) -- As any aircraft maintainer can attest, corrosion is a major factor affecting the overall health of military aircraft. Anything from changing temperatures to environmental factors can precipitate corrosion. One major contributor, however, is often overlooked -- microbes.

The Air Force Research Laboratory’s biological materials and processing research team is shining a new light on microbiologically influenced corrosion research and how it affects aircraft structures and fuel systems. These researchers look into the causes, effects and prevention of corrosion caused by living organisms.

Over time, mold, mildew, fungi, bacteria and other organic contaminants can build up on aircraft structures as a result of a number of factors including moisture, humidity and human contact. Contaminants not only pose potential health hazards to maintenance crews, but also some can produce acids and enzymes that slowly corrode aircraft surfaces.

“Microorganisms can eat away at surface materials, and some of the worst areas affected are tight, hard-to-reach areas that maintainers have difficulty disinfecting,” said Dr. Wendy Goodson, the AFRL biological materials team lead.

As the military fleet ages, microbial contamination is poised to become an increasingly urgent issue. To address the problem, Goodson helped validate and test the Joint Biological Agent Decontamination System (JBADS), an environmentally controlled enclosure in which an entire aircraft -- even areas inaccessible to maintenance crews -- can be heated to temperatures of up to 180 degrees Fahrenheit. The process eliminates over 99.9 percent of biological contaminants on aircraft surfaces safely and quickly, without putting aircrews and support personnel at risk of exposure. Also, because the microbes are virtually eliminated, regrowth is greatly inhibited.

JBADS offers numerous other benefits over traditional manual decontamination. It enables the full decontamination of an aircraft in hours as opposed to days, allowing it to be returned to service more quickly. It also reduces manpower, thereby lowering maintenance costs.

A recent successful demonstration of the JBADS concept has generated considerable interest within the user community, and the system is expected to be fully implemented by 2017. But the AFRL team’s efforts don’t stop there. In addition to surface contamination, Goodson’s team is also looking into the effects of biocontaminants in fuel systems.

In an effort to move toward more environmentally friendly energy solutions, the Air Force increasingly relies on biofuels, which come with their own challenges. Since biofuels are processed from organic materials, such as vegetable oils and animal fats, microbes live and thrive in them. These microbial contaminants can create unwanted consequences, such as fuel fouling, fuel degradation and material degradation.

Goodson’s team studies the impact of microbial contamination on biofuels, including how quickly and under what environmental conditions contamination occurs, how susceptible biofuels are to contamination, and the effect of biofilm buildup on aircraft and ground fuel systems. The team is currently studying potential effects of biofuel contamination on tanker aircraft, establishing baseline microbial readings and pinpointing areas that harbor microbiology.

A matter of particular interest to the team is the impact of bioaccumulation on fuel storage tanks. By conducting coupon tests, the team has discovered that microbes immediately begin affecting steel and other structural materials. Over time, the biofilms cause pitting and corrosion. This information tells the team that contamination of biofuels is a potential threat to tanker and storage structures as well.

To combat fuel storage tank contamination, maintainers typically power wash the tanks; however, tanks that store biofuels require much more frequent decontamination than non-organic jet fuel storage tanks, and power-washing methods have proven less effective for biofuels.

“It impossible to remove every trace of microbial matter,” Goodson said. “Power-washing removes visible biomass, but leaves billions of microorganisms that begin re-infecting the next batch of fuel as soon as in it introduced into the tank.”

This is where JBADS comes into play again. The AFRL team is now working to expand JBADS for use on fuel storage tanks. By using JBADS, maintainers will not only clean the tanks but also sanitize them, greatly reducing the rate of re-accumulation of microbes and, therefore, increasing the amount of time between cleaning cycles.

The Air Force spends approximately $6 billion annually on corrosion issues, of which up to $1.2 billion is potentially spent on microbiologically influenced corrosion. Add to that the costs of biofuel fouling, storage tank and structure cleaning, and other preventative and maintenance costs, and Goodson said the technologies her team is developing could be critical tools for the future of the warfighter.

“These solutions are essential in light the changing face of fuels and fuel systems. They could be real game changers for military aircraft sustainment,” Goodson said.


Facebook Twitter
Peace meets pandemonium as @20FighterWing Security Forces #Airmen go to battle in force-on-force training.… https://t.co/hP4l8H9XGi
LIVE at 10 am: @SecAFOfficial & @GenDaveGoldfein provide testimony at a Senate Appropriations Defense Subcommittee… https://t.co/Qc8h81cRPB
RT @AETCommand: A 81st #SecurityForces Squadron #militaryworkingdog aren't to be messed with! Truly a lethal force from @Keesler_AFB Read m…
Like cars, jets require routine maintenance too. See what the #USAF's B-52 Stratofortress endures to pass inspectio… https://t.co/gsxZFYLLE9
#Airmen across @RamsteinAirBase recently wrapped Exercise Tacet Vevari, better known as the "silent hunt" to identi… https://t.co/vBalvhLeWh
“The strategic value of the Arctic as our first line of defense has reemerged...” - USAF Gen. Terrence O’Shaughness… https://t.co/fbMi1qfz59
The #USAF’s budget would rise to $165B in #FY2020 under the White House spending plan unveiled March 12, a $10B inc… https://t.co/NjGUdeSiAE
This #Airman is paving a runway that would allow her to take off to a bright future for herself & those women & you… https://t.co/gcPWPk9u5f
#ICYMI: @28thBombWing #EOD accounted for 400+ @USNavy projectiles after highway collision. https://t.co/hbO70xcZpy https://t.co/GUeRPKwD03
In celebration of #WomensHistoryMonth, we recognize the first female #Airman to be selected for the grade of E-9, C… https://t.co/KIXeYUuBg8
RT @HQ_AFMC: This #rodeo didn't feature cowboys & girls--rather, it lasso'd up the next BIG ideas in @usairforce #innovation including new…
An #F16 flies over @TeamEglin, Feb. 14, 2019. The 40th Flight Test Squadron’s mission is to execute exceptional fig… https://t.co/DoTGJRvV8u
.@KunsanAirBase #Airman named 2019 Federal Engineer of the Year after leading a 324-member coalition team in execut… https://t.co/mR7Ee4rTuF
This @180thFW #Airman spent two months in Antartica with one mission: keep the #Airmen safe in the most inhospitabl… https://t.co/Eq8j6EKUZ7
Professionals at #Airman & Family Readiness Centers stand ready to support military spouses with achieving their sh… https://t.co/wBRbGaF2HU
#AirForce RPAs reach a historic flight milestone, completing more than 4 million flying hours in support of a 24-ho… https://t.co/FfoSUAOuIc
.@US_EUCOM deployed a THAAD system to #Israel under the Dynamic Force Employment Concept. The exercise builds readi… https://t.co/u5L7ZfX2i9
#MentorMonday: Join this @81trwKeeslerAFB #Airman on his journey to find and hold a conference with peers who shar… https://t.co/tDTg9mXjQC