Operating Experience
First-hand knowledge of airlines, aircraft operations and fleet economics.
Our Strategies
Three areas of focus. One aviation discipline.
Metolius Aviation Opportunity Group works with a number of partners to source, acquire and monetize commercial aviation engines and airframes.
Metolius Aviation Financial Advisory Partners structures financing for specialized aerospace and defense businesses — from supply-chain and inventory finance to private debt.
Metolius Aerospace Ventures arranges and invests in private companies focused on new technologies, fast-growing aerospace and defense businesses and companies generating significant cash flow.
01Metolius Aviation Opportunity Group
Short duration, asset backed, high yield returns.
Aircraft delivery delays, engine availability issues and persistent aerospace supply-chain constraints are requiring airlines to operate existing fleets longer than originally anticipated — increasing demand for Used Serviceable Material (USM): certified components harvested from aircraft and engines that can be returned to service in the global fleet.
The Opportunity Group brings together experienced aviation operators, technical partners, financial partners and investors to acquire aircraft and engine assets at attractive values and monetize them through leasing, trading, teardown and the sale of components into the global USM market.
Current Focus — Boeing 777 Teardown
The Boeing 777-300ER
1,208
Boeing 777s in commercial-airline fleets worldwide
581
777-300ERs — the largest passenger variant
74
passenger and cargo airline operators
As of the latest publicly compiled 2026 fleet data, approximately 1,208 Boeing 777s are in commercial-airline fleets worldwide, operated by 74 passenger and cargo airlines. An additional 11 aircraft serve governments or military organizations, bringing the worldwide operational fleet roster to roughly 1,219 aircraft. This includes the 777-200, -200ER, -200LR, -300, -300ER and 777F.
For the Metolius teardown thesis, the most important figure is the 581-aircraft 777-300ER fleet. It is by far the largest passenger variant and represents nearly half of all commercially operated 777s, creating the broadest installed base for GE90-powered aircraft, replacement components and USM demand.
The transition is likely to be a long overlap rather than a rapid replacement. The 777X begins entering service in 2027, while the 777-300ER remains a major global fleet well into the late 2030s.
The principal takeaway for the Metolius teardown thesis is the likely 2030–2038 retirement window:
- Approximately 300–400 777-300ERs could leave primary airline service during this period.
- The illustrative crossover occurs around 2035, when the passenger 777X fleet becomes larger than the remaining 777-300ER fleet.
- Retirements should accelerate as early-production 777-300ERs reach roughly 25–30 years of age and major maintenance events become uneconomic.
- Many later-build aircraft should remain active into the 2040s, supporting an extended market for GE90 engines and USM components.
- Delayed 777X certification or slow production would flatten the phase-in curve and extend 777-300ER service lives — potentially strengthening near-term demand for replacement parts.
- Boeing has accumulated approximately 556 passenger 777X orders, although the timing remains uncertain. First delivery is currently expected in 2027, with Emirates indicating deliveries from the second quarter.
Conclusion High demand for USM over the next decade to support ageing B777-300ER fleets.
02Metolius Aviation Financial Advisory Partners
Structuring capital for specialized aerospace and defense businesses.
Financial Advisory Partners arranges and structures financing for aerospace and defense companies where understanding the equipment, the operators and the industry cycle matters as much as the balance sheet.
Our work spans supply-chain and inventory financing, receivables factoring and private debt — solutions designed around the cash-flow realities of manufacturing, MRO and technology businesses.
- 01 Supply Chain Financing
- 02 Inventory Financing
- 03 AR Factoring
- 04 Private Debt
Transaction
Grob Aircraft
MAC arranged financing for German aircraft manufacturer Grob Aircraft. The financing supported the business through to its subsequent acquisition by defense technology company Helsing.
grobaircraft.com03Metolius Aerospace Ventures
Investing in early-stage startups, leveraging our network to identify major trends early.
Metolius Aerospace Ventures arranges and invests in private companies, focused on new technologies, fast-growing aerospace and defense companies and companies generating significant cash flow.
We believe investment strategies in aerospace and defense are evolving rapidly in the current global environment, and we work with debt and equity partners to scale the industry’s growth in Europe and the USA.
Portfolio Partnership
Turbine Capital Group
MAC is a partner in Turbine Capital Group, a growing aviation services business focused on the acquisition and leasing of commercial aircraft engine stands — infrastructure supporting the global commercial engine market.
Visit turbinecapitalgroup.comFoundation
The convergence of four areas of experience
Asset Experience
Decades of experience acquiring, selling, leasing and managing commercial aircraft and engines.
Financial Experience
Structuring aviation and aerospace financings — from individual asset transactions to institutional financings of approximately $500 million.
Industry Relationships
Long-standing relationships across airlines, lessors, banks, MROs, aerospace companies, engine specialists and institutional capital providers.
A discreet conversation, first.
All three strategies are built on long-standing relationships. If you are an investor, operator, founder or technical partner, we welcome an introduction.
Contact MAC