Most owners come to the decision to sell too late. Not by years — but by one big event. That event is usually a heavy maintenance visit.
By the time the aircraft is back from the shop, the economics of a potential transaction have shifted in ways that don't usually favor the seller.
Here's what typically happens: An owner knows a major inspection is coming — like a C-check, a 10 or 12-year inspection, and/or an engine overhaul event — and wonders whether to sell the aircraft as-is, leaving the required work to the new owner, or hold on, get the work done, and sell a freshly maintained aircraft. The logic sounds reasonable. A clean maintenance record, all the big-ticket items addressed, no near-term scheduled maintenance hanging over the deal. What could possibly go wrong? Well…the bill, of course.
What Heavy Maintenance Actually Costs
For a large-cabin jet — a Falcon 900EX or a Gulfstream G650 — a full heavy maintenance visit, a 10-year inspection or C-check equivalent, routinely runs $1.5 million to $3 million, and that's before addressing a single squawk the inspection uncovers. Add engine overhaul events, replacement of life-limited parts, and whatever else the shop finds, and $4–5 million total exposure on a 20-year-old airframe is not unusual.
The Pratt & Whitney PW308C engines on a Falcon 2000-series carry their own heavy visit costs. Engine work on a pair of mature turbofans — shop visits, life-limited parts replacement, on-condition findings — can run $1–2 million per engine depending on configuration and condition. On a GIV with Rolls-Royce Tay 611s, the economics are similar. These are not fringe cases. They are the numbers that experienced fleet managers plan around every inspection cycle.
What does the market pay for that investment? Less than most owners expect.
The Pre-Check vs. Post-Check Price Reality
A well-maintained large-cabin jet with a heavy inspection coming due typically sells at a discount to its fully maintained counterpart. Most sellers know that going in and accept the markdown. What surprises many people is the actual size of the premium the market applies after the work is done — because it's almost always far smaller than the actual cost of getting the work done.
What I'm seeing firsthand is that qualified buyers are moving fast on aircraft that come to market with a strong maintenance history. There is a post-check premium — albeit usually lower than the cost of the work done — but what matters most is how it's sequenced. Sellers who move ahead of check events hold the leverage. Clean, well-maintained aircraft, even with maintenance coming due, consistently attract stronger offers and close faster.
If you spend $3.5 million getting an aircraft through a heavy visit hoping to sell it for $3.5 million more than the pre-check value, the math rarely works. The maintenance investment often gets absorbed as a sunk cost.
When Selling Before the Check Makes Sense
This calculus doesn't apply universally. A younger aircraft — under 10 years old — with attractive specs and low time is a different animal. The maintenance economics are less punishing, residual value is stronger, and demand is quite tight right now, with available large-cabin inventory under seven years old down significantly year over year. Selling a young, well-equipped aircraft before a heavy check means selling into a market offering buyers few alternatives — a different calculation entirely.
Older airframes facing meaningful scheduled maintenance are where this analysis matters most. For an aircraft in the 15–25-year range carrying approaching-due engine events or a 10-year structural inspection, selling before the check — at a pre-maintenance price that reflects market reality — frequently offers a better financial outcome for owners.
What the Timing Really Looks Like
The window to sell before a heavy visit is shorter than most owners realize. A properly structured sale — marketing, buyer qualification, pre-purchase inspection, title, escrow, and closing — takes three to six months under normal conditions. Marketing an aircraft that needs to be pulled from service in four months means racing against time. That puts the owner in a position where they either take a lower price to sell quickly — or miss the window entirely.
If a heavy maintenance visit is 12 to 18 months out, the time to start the conversation with your broker is now — not after the check. And not after you've made a firm decision either. The conversation, to be useful, must take place early enough for real options to still be on the table.
The Question Worth Asking
For any owner of a large-cabin jet with a significant scheduled maintenance event on the near horizon, one question is worth putting directly to your broker: Given current market values and the projected cost of the upcoming maintenance, what does the net owner position look like across each scenario?
My honest answer won't always favor selling. Sometimes the aircraft profile and an operator's mission make holding and maintaining the right call. What matters is making that calculation with actual numbers — before the maintenance decision is locked in, not after.
If a heavy inspection is on your horizon in the next 12 to 18 months, please get in touch. The objective numbers will tell you what to do, and I would love to help you work through them.