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The Support Equipment and Vehicles Division at Robins AFB, GA (AFLCMC/WNZ) had a requirement for a 5-year, Fixed Price Incentive Firm Target (FPIF)/Firm Fixed Price (FFP) Indefinite Delivery/ Requirements-type contract for overhaul of the 60K Tunner Aircraft Cargo Loader (NSN - 3930-01-409-0339CT, Part Number - 9032950). The Tunner is a self-propelled 60,000-pound capacity aircraft cargo transporter loader. The Tunner weighs 66,000 pounds; is approximately 15 feet wide by 50 feet long; and is approximately 22 feet tall when fully extended. It transfers loads to and from warehouses, and to and from cargo aircraft on the flightline. The Tunner interfaces with docks in warehouses and all Air Force cargo aircraft, including many commercial Civil Reserve Air Fleet (CRAF) aircraft. The Tunner's powered conveyor system moves loads on unit load devices (ULDs): pallets, platforms, and containers. The roller system on the deck converts to a flat deck for rolling stock loads. The deck rolls, side-shifts, yaws, and pitches. The Tunner is air transportable on the C-5 and C-17 aircraft. It is powered by a 6 cylinder diesel engine that drives hydraulic pump stack. The suspension height is adjustable.
The Tunner complexity is much more than that of a special purpose truck, but less than that of a modern aircraft. The suspension consists of complex custom-made stainless steel castings. The chassis rails consist of two configurations, one constructed of non-weldable heat-treated stainless steel material, and the other is weldox, a low alloy weldable steel material. The cab structure is of riveted aluminum construction. The deck is a riveted aluminum structure with fifty foot extruded tubular sections open on the ends. The lift link structure is a combination of high strength steel weldments and stainless steel castings. An event-driven programmable processor (later models) controls the hydraulically actuated deck, whereas the earlier models are controlled by relay logic. The vehicle is propelled by hydrostatic drive with hydraulic motors mounted on the driven axle bogies. The hydraulics also actuates the powered conveyor, radiator cooling fans, suspension, and steering systems. Two pump stacks consisting each of one variable displacement axial piston pump, one gear pump, and one charge pump, provide pressure for all circuits. The hydraulic circuits are discrete for continued operation should one pump stack fail, and containing many types of valves such as pilot operated check valves, pressure relief valves, counter balance valves, cross-over valves to allow degraded operations using one pump stack, flow dividers, pressure and flow control valves, etc. There is an electrical emergency pump system to operate the deck functions and steering when the hydraulic system pumps fail to operate.
The contract has a one-year basic period of performance with four (4) one-year options and includes the following: Material Management (MM) – Infrastructure, Material Management (MM) Parts, Program Engineering Support (PES), Unscheduled Depot Level Maintenance (UDLM) and Contingency High Priority Mission Support Kits (CHPMSK) for the Tunner Aircraft Cargo Loader. The best estimated quantities for Material Management (MM) – Infrastructure are 12 MO for each year. The best estimated quantities for Material Management (MM) Parts are 85,000 HR for the basic year. The best estimated quantities for Material Management (MM) Parts are 90,000 for each subsequent option year. The best estimated quantities for Program Engineering Support (PES) are 12 MO for each year. The best estimated quantity for Unscheduled Depot Level Maintenance (UDLM) is 1 LO for each year. The best estimated quantity for Contingency High Priority Mission Support Kits (CHPMSK) is 1 LO for the 30 Day Kit and 1 LO for the 90 Day Kit for each year.
The delivery schedule is as follows:
Period CLIN Period of Performance
Basic 000X 22 November 2024 – 21 November 2025
Option I 100X 22 November 2025 – 21 November 2026
Option II 200X 22 November 2026 – 21 November 2027
Option III 300X 22 November 2027 – 21 November 2028
Option IV 400X 22 November 2028 – 21 November 2029
The contract action was not awarded competitively. DRS (UP54BEGGMGV5) was the only vendor to respond to a Sources Sought RFI or submit a proposal. They are currently the only firm capable of providing the services required.