Learjet 31A vs Sabreliner 65: which budget jet is the better deal?

MINIMUMSDo you sort jet listings by price, low to high? Does a twin-engine jet asking less than half a million dollars grab your attention? MINIMUMS is the new GlobalAir.com column for the reader who stopped to look. We'll take used jets listed at bargain prices and ask what a low price buys, what the real-world costs are, and whether flying for value holds up as a plan.We dug deep for our first comparison, which pairs a 1992 Learjet 31A with 4,507 hours total time against a 1981 Sabreliner 65 with a 2016 interior upgrade. On GlobalAir.com as of Sept. 30, the Learjet is the lowest-priced of three Learjet 31As listed, and the Sabreliner is the only 65 listed. One is a light jet and the other a midsize.Here, we have two jets in the same approximate price range. Both aircraft have twin Honeywell TFE731 engines. Beyond that, they're two different animals.The Bombardier Learjet is enrolled in a lease/power-by-hour (PBH) framework while the Sabreliner lacks any engine program. The Sabreliner's engines are roughly 2¼ to 3 years from their next major periodic inspections (MPIs) and core zone inspections (CZIs). The Learjet's are much farther out: more than 1,000 hours to an MPI and over 2,000 to a CZI. For this comparison, we'll assume each jet racks up 200 flight hours per year, consistent with the utilization Jettly uses in its light-jet cost examples.The two jets at a glance 1992 Learjet 31A1981 Sabreliner 65 Asking price$499,000$395,000 ClassLight jetMidsize jet Airframe total time4,507 hrs8,036.8 hrs EnginesTwo Honeywell TFE731-2-seriesTwo Honeywell TFE731-3R-1D Engine programKalitta Turbines lease/PBH, $195 per engine per hourNone Hours to next MPIMore than 1,000 (estimate)458 (both engines) Hours to next CZIOver 2,000 (estimate)516 and 624 At 200 hrs a yearMPI 5+ years, CZI 10+ yearsMPI about 2¼ years, CZI 2½ to 3 years Engine program cost, next two years$156,000None Source: GlobalAir.com listings as of Sept. 30, 2026. Learjet MPI and CZI figures are estimates from listing hours and Duncan Aviation intervals. Hours-to-inspection and program cost assume 200 flight hours per year. Learjet 31A listings | Sabreliner 65 listings1992 Learjet 31A — $499,000This Learjet 31A has 4,507 hours total airframe time and two Honeywell TFE731-2-series engines. Engine 1 (P-73223C) has 2,015 hours since its last CZI and 310 hours since its last MPI. Engine 2 (P-74988C) has 1,563 hours since its last CZI and 314 hours since its last MPI. Both engines are listed with a TBO of 4,000 hours.Both engines are leased and supported through Kalitta Turbines' program at $195 per engine per hour. The listing doesn't say what that rate covers, which a buyer would need to confirm before counting on it for a CZI or MPI.1981 Sabreliner 65 — $395,000Built by Rockwell International, the successor to North American Aviation, this 1981 Sabreliner 65 is powered by two Honeywell TFE731-3R-1D engines. Each engine has more than 7,900 hours since new.Both Sabreliner powerplants have roughly 458 hours until their next required MPIs and 516 and 624 hours until their upcoming CZIs, figures that work out to 1,400-hour MPI and 4,200-hour CZI intervals. At 200 flight hours per year, the Sabreliner's next MPIs and CZIs are roughly 2 to 3 years away.With no engine PBH program in place, the Sabreliner owner is operating with a simple time-and-materials (Tandamp;M) contract. If the inspection reveals major engine damage or mandates high-dollar labor costs for engine disassembly, the Sabreliner owner is out of pocket for every hour and every part (at current market or list price). Without a contractual limit on the final expense, "the sky's the limit" isn't an exaggeration.How the TFE731 inspection clock worksGarrett AiResearch originally developed and manufactured the TFE731. Today, Honeywell supports this engine.Honeywell has extended TFE731 intervals through service bulletins and engine upgrades, so the interval depends on the engine's configuration and modification status, according to Duncan Aviation. Non-upgraded -2 and -3 engines run 1,400-hour MPI and 4,200-hour CZI intervals, while the -2C, -3C and -3D versions run 2,100 and 4,200. On the 1,400/4,200 schedule, every third MPI falls due alongside a CZI. On the 2,100/4,200 schedule, every second one does.The engine's maintenance manual and any applicable service bulletins set the actual intervals, so a buyer should confirm both for the specific engine.What an MPI and a CZI can cost per engineBecause an MPI only examines the TFE731 engine's hot section, and a CZI requires more extensive engine disassembly, the two procedures' price tags are drastically different. The following figures are per-engine broad ranges, so double the estimate for either two-engine jet. Actual numbers will vary with the specific engine, number of parts, and the shop that performs the work, according to Flying411.Minimal MPI with a good hot section and few parts: Tens of thousands price rangeStandard MPI with unknown hot section and parts: Potential low six-figure price rangeComplete CZI with engine teardown: Well into six figures possibleCZI involving multiple life-limited parts (most expensive scenario): Substantial price increase over previous estimateA lower estimate may be based on standard engine access, inspection, reassembly, and testing. Once the inspector examines the engine, they can provide a quote that integrates service bulletins, parts (including life-limited parts), required tests, and labor. The shop's repair vs new policy also figures into the mix, according to The Flight Brief.Finding a maintenance and repair facility authorized to work on the TFE731 engine is key. StandardAero is an OEM-authorized TFE731 maintenance provider that supports both the Learjet's and Sabreliner's TFE731 installations. The company operates multiple United States locations along with UK and Brazil facilities.Does the $104,000 discount survive the engines?Over the next two years, the Learjet 31A will have these projected PBH expenses: 400 flight hours on each engine x $195/hour = $78,000. Two engines: $156,000 total. That is $52,000 more than the $104,000 price gap. Whether the Kalitta rate also covers a future CZI or MPI is not stated in the listing.The Sabreliner 65 is listed for $104,000 less than the Learjet 31A. However, with no PBH program in place, unexpected maintenance findings could substantially reduce or eliminate that $104,000 purchase price advantage.The Learjet's PBH program provides greater predictability for covered engine maintenance expenses. On the other hand, the Sabreliner owner bears more direct exposure to the cost of upcoming engine inspections and any findings. Both jets' actual CZI and MPI costs are unknown.What buyers should watchTwo years of Kalitta fees run $156,000 on the Learjet, $52,000 more than the price gap, and the listing doesn't say what that money covers. The Sabreliner costs less today and asks for a bigger cushion when the shop opens the engines. Bargain hunting comes down to one question: how deep are your pockets?Questions buyers ask about these two jetsWhat is the difference between an MPI and a CZI on a TFE731 engine?An MPI (major periodic inspection) examines the engine's hot section. A CZI (core zone inspection) requires more extensive disassembly, so it costs far more. On non-upgraded TFE731-2 and -3 engines the intervals are 1,400 hours for an MPI and 4,200 hours for a CZI, according to Duncan Aviation.How much does a TFE731 inspection cost?Flying411 puts an MPI with a good hot section and few parts at tens of thousands of dollars per engine, and an MPI with unknown findings in the low six figures. A full CZI with teardown can run well into six figures per engine, and one involving multiple life-limited parts costs more. Double those figures for a twin. Actual bills vary with the engine, the parts and the shop.What is a power-by-the-hour (PBH) engine program?A PBH program charges a set hourly rate per engine in exchange for covered maintenance, which makes engine costs more predictable. What is covered varies by contract. The 1992 Learjet 31A's engines are leased and supported by Kalitta Turbines at $195 per engine per hour, and the listing does not say what that rate covers.How much do a 1992 Learjet 31A and a 1981 Sabreliner 65 cost?On GlobalAir.com as of Sept. 30, 2026, the 1992 Learjet 31A lists at $499,000, the lowest-priced of three Learjet 31As listed (one is price on request). The 1981 Sabreliner 65 lists at $395,000 and is the only Sabreliner 65 listed. The gap between the two is $104,000.Which costs less to own over two years, the Learjet 31A or the Sabreliner 65?At 200 flight hours a year, the Learjet's Kalitta fees come to $156,000 over two years, which is $52,000 more than the $104,000 price gap. The Sabreliner has no hourly engine fee but is exposed to inspection costs, and its next MPIs are about 2¼ years away. Neither jet's actual inspection costs are known.What is the cheapest private jet to buy?The answer changes as listings change. The two jets in this article list at $395,000 and $499,000, and GlobalAir.com's jet inventory includes listings priced lower. Purchase price is only the start: Jettly puts a light jet's annual operating cost at $500,000 to $1.2 million at around 200 flight hours a year.See the 1992 Learjet 31A and the 1981 Sabreliner 65 on GlobalAir.com.