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US Air Force Extends Development of Aircraft Repair Tents

Aerospace firm Cornerstone Research Group has secured a $1-million contract to extend maintainer-fabricated enclosure kit (MFEK) development for the US Air Force.

MFEKs are walk-in enclosures similar to pop-up tents used by sustainment teams when repairing parked fighter jets.

The air force wrote that the solution being designed, produced, and tested for the MFEK initiative is Cornerstone’s proprietary Deployable Isolation Repair Technology or DIRT Bag (DB) 6090.

Cornerstone Research Group’s DIRT Bag DB-2424, a small 24” x 24” x 20” portable maintainer fabricated enclosure kit, or MFEK, that includes two hand ports, one hose port and one filter for routine maintenance, is set up for flightline testing on an aircraft wing at a Marine Corps Air Station facility in Dec. 2023. The DB-2424 enables debris- and dust-free structural repairs on localized areas of an aircraft and provides a controlled work environment that works the same way for every aircraft maintainer, every time. The DB-2424 is a sister product of and can be paired with the DIRT Bag DB-6090, a larger walk-in enclosure kit that is also portable, scalable and reconfigurable from 54” up to 90”. Both prototypes were developed under an Air Force Research Laboratory Small Business Innovation Research program. (U.S. Air Force photo)
DIRT Bag DB-2424, a small 24” x 24” x 20” portable maintainer fabricated enclosure kit, or MFEK. Photo: Gail Forbes/US Air Force

The DB-6090 measures 60 x 90 x 60 inches, incorporates transparent panels and lightweight telescoping pole frames, and can be modified into other shapes and sizes.

This portable system keeps aircraft components, debris, and residual materials in an area segregated from the rest of the hangar or depot. It is compatible with temperature regulators to meet the environmental requirements of an aircraft part being repaired.

The DB-6090 can be transported via a 1’ x 1’ x 6’ rolling storage bag, removed, and deployed in less than 30 minutes.

The Ohio-based company signed the initial contract in February 2022. The latest award continues the framework agreement until June 2024.

Less Down Time

Cornerstone Project Lead Josh Adkinssetty highlighted the importance of MFEK when working on the F-35 Lightning II and its weapon systems, which the Air Force describes as a “challenging aircraft to maintain.”

“If it’s cold outside… maintainers have to pull it into the hangar [to maintain it], and that might mean needing to play musical aircraft, because at any given time they have all of these other aircraft that they know need worked on.” 

“So, how do you manage all of that? This piece of gear [the DB-6090] kind of takes that out of the equation. I can go set this thing up on the flight line, throw a heater on it, control my environment, and perform the work that I need to, and it reduces the mean downtime between flights.”

US Air Force F-35A conducts first ever air interdiction
A US Air Force F-35A Lightning II. Photo: US Air Force/Staff Sgt. Chris Drzazgowski

The MFEK Project

Cornerstone is collaborating with US Air Force innovation arm AFWERX to demonstrate the DB-6090 to industry partners and program offices for future use.

The tent will eventually be made commercially available simultaneously with the approval of the system’s utility for US Department of Defense applications. Once on the market, the DB-6090 will be offered with DB-2424, a smaller DIRT Bag variant developed in the earlier MFEK phases.

Meanwhile, DB-6090 prototypes have completed field evaluations in military testing sites across California, Arizona, and other states for the solution’s introduction into service.

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