AAR CORP. on May 1, 2026 announced a $305 million follow-on contract from the U.S. Navy and U.S. Marine Corps for performance-based logistics (PBL) support of the C-40A Clipper aircraft fleet. The award continues a relationship that dates to 2014 and covers supply chain management, engineering, on-aircraft maintenance, modifications, structural repair, and component overhaul for the Navy's intra-theater airlift fleet. Performance-based logistics ties AAR's compensation to fleet availability metrics rather than material consumption — a fundamental shift in how sustainment contracts allocate risk between government and contractor.
The C-40A fleet and its mission
The C-40A Clipper is a military transport derivative of the Boeing 737-700C — the convertible variant of the Next-Generation 737 that can be configured as an all-passenger, all-cargo, or mixed cabin aircraft. The Navy operates 17 C-40As across five fleet-readiness and transport squadrons, providing intra-theater personnel and cargo airlift for Navy and Marine Corps commands that lack dedicated ground transportation or require rapid inter-base movement of personnel, time-critical parts, and high-value cargo.
The five supported squadrons — VR-56 (Norfolk), VR-58 (Jacksonville), VR-59 (Fort Worth), VR-61 (Whidbey Island), and VR-64 (Sigonella, Italy) — are all Navy Reserve units, which makes this an important example of how PBL structures work for reserve-component fleets: high optempo during surge, lower utilization in peacetime, but constant readiness requirement year-round.
What performance-based logistics means for revenue
Under a traditional time-and-materials or cost-reimbursement sustainment contract, a contractor gets paid for labor and parts consumed regardless of whether the aircraft actually fly. Under PBL, the contract defines availability or reliability metrics — typically mission-capable rate or fleet-ready rate — and pays against those outcomes. For AAR, this means the company must optimize its entire supply chain, component repair network, and on-aircraft maintenance program to keep the 17-aircraft fleet available at whatever MC rate the Navy contracts for, using its own investment in spares depth and shop capacity rather than billing labor hours.
The risk transfer is real: AAR absorbs variability in repair costs and parts consumption. But the reward is also real — if AAR can maintain availability above the threshold with lower-than-expected parts burn, the margin expansion flows directly to the company. AAR's C-40A PBL performance has historically been one of its strongest reference cases in competitive pursuits for similar Navy and Marine Corps work.
C-40 fleet composition and future outlook
| Variant | Operator | Qty | Config | Notes |
|---|---|---|---|---|
| C-40A | U.S. Navy Reserve (VR squadrons) | 17 | 737-700C convertible | This PBL contract |
| C-40B | USAF, ANG | 4 | 737-700 VIP transport | Separate contract |
| C-40C | USAF, ANG, AMC | 16 | 737-700 high-density pax | Separate contract |
The Navy's C-40A fleet is in its mid-life phase — the aircraft were delivered between 2001 and 2010, making the youngest airframes now 16 years old and the oldest 25. Mid-life is typically when structural repairs, avionics modernization, and cabin interior refresh become the dominant sustainment cost drivers — all squarely within AAR's scope. The Navy has not publicly released a C-40A Service Life Extension Program (SLEP) timeline, but given the aircraft's structural characteristics (similar to the workhorse commercial 737-700, which regularly serves 25+ year service lives), the fleet is likely viable well into the 2030s with proper sustainment.
AAR's broader MRO positioning
AAR Corp is one of the largest independent aviation MRO providers in the world, with facilities in Miami, Indianapolis, Oklahoma City, Amsterdam, and other locations. The C-40A PBL is an example of the company's "government solutions" division competing directly against prime-contractor MRO shops (Boeing Global Services, Lockheed Martin's sustainment division) for Navy work. For subcontractors, AAR's government network is a meaningful channel for component overhaul work — particularly engines (CFM56-7B, the same powerplant used on the commercial 737 Next Generation), landing gear, APUs, and avionics line-replaceable units.
What it means for the broader PBL market
The C-40A follow-on comes as the Navy is expanding PBL usage to additional platforms under its Total Life Cycle Systems Management policy. Contractors considering PBL pursuits should study AAR's C-40A model: a small, high-utilization fleet, a single-contractor PBL structure with clear availability SLAs, and a track record long enough to demonstrate the model's financial sustainability. The $305M award — roughly $18M per year averaged over the expected ordering period — reflects both the fleet's modest size and the overhead-efficient nature of a well-run PBL program.