Scarce parts support
The original Japanese fleet is small and has been discontinued for decades; operators increasingly depend on the used-parts market and PMA for maintenance.
Foto: Cory W. Watts from Madison, Wisconsin, United States of America · CC BY-SA 2.0 · Wikimedia Commons
Mitsubishi Diamond II MU-300
BE40Light JetDiscontinued1981–1986
Range
1,500 NM · 2,778 km
MTOW
6,577 kg
Cruise
458 kt · 848 km/h
Mach ≈0.80
Seats
9
up to 9 passengers
Used price
US$ 375,000
The Mitsubishi Diamond II MU-300 is a light jet produced between 1981 and 1986. It has a range of 1500 nm, a cruise speed of 458 kt (848 km/h), Mach 0.80, up to 9 passengers. Out of production; on the used market the median is around US$ 375,000. There is 1 aircraft from this family for sale today, across 1 listing on the portals Jet Tracker tracks (global market, not Brazil only).
Source: RAB-ANAC (data as of 10/19/2026) and Jet Tracker catalog (spec sheet reviewed on 10/10/2026).
Acquisition price · pre-owned market
limited data1 active listings (global)Jet Tracker curation · 7 sources · 6/4/2026
US$ 375.0KR$ 1.9M
market medianaging ≈ −4.7%/yr−80% vs Light Jet median
Entry
US$ 330.0K
model year 1981
Best value
US$ 375.0K
model year 1983
Top of range
US$ 420.0K
model year 1986
Basis
Listings
real listings
Minimum
US$ 200.0K
R$ 1.0M
Median
US$ 375.0K
R$ 1.9M
Maximum
US$ 1.0M
R$ 5.0M
Depreciation curve by year of manufacture
CAGR +4.9%/yr·1981→1986
Market median by vintage (USD). Light-blue band = min/max range observed across real listings. Points without reliable public listings (n ≤ 1) use Bluebook/curve interpolation and are flagged as lower confidence.
4 of 6 points with reduced confidence (n ≤ 1 listing observed). The estimate for these years comes from Aircraft Bluebook / market-curve interpolation, not from direct listings.
Landed in Brazil
Index ≈ ×1.29 to ×1.56 on the aircraft value, already with ferry, ANAC nationalization and ICMS.
Air taxi
US$ 283.0K – 1.3M
R$ 1.4M – 6.5M · ICMS Agreement 75/91 · ~4 to 5%
Private use
US$ 311.0K – 1.5M
R$ 1.6M – 7.5M · ICMS ~18 to 25%
Market estimate: value + ferry + ANAC nationalization + ICMS, no legal review. Federal taxes (II/IPI/PIS/COFINS) ~0% for aircraft (NCM 88.02); the weight is the state ICMS, higher for private use.
Cost per flight hour
Operate · owned
US$ 2.6K/h
R$ 13.1K/h · Variable/h
- Fixed/yr
- US$ 294.5K
- Total/h @ 400 hrs/yr
- US$ 3.3K/h
Charter · 🌎 World
US$ 2.6K – 2.9K/h
R$ 13.1K – 14.6K/h
Charter · 🇧🇷 Brazil
US$ 3.0K – 3.5K/h
R$ 15.1K – 17.7K/h
Operate = direct cost/hour (fuel + maintenance + engine); excludes fixed costs (hangar, crew, insurance). World: hourly rate published by charter operators. Brazil: charter is quoted per leg, so the hourly figure is an estimate from route quotes.
How we read this price · 7 sources · researched 6/4/2026
Median and price range for pre-owned aircraft, compiled by Jet Tracker from asking prices in listings and the price guides in the sources below, checked on 6/4/2026. 3 of 6 model years have an observed listing. The rest are estimates from the market curve between model years and are flagged in the chart.
- planephd - Mitsubishi Diamond 1A (specs/valuation/PAPI)
- General Aviation Services - 1982-1985 Mitsubishi Diamond IA
- Aircraft Cost Calculator - Mitsubishi Diamond 1A
- Controller.com - Mitsubishi MU-300 Diamond listings
- Aeronaves a Venda (BR) - cota Mitsubishi MU-300
- aircraft.com - listings MU-300 (N442EA 1983, N400GK 1982, N37CB 1983)
- aircraft-forsale.com - 1983 MU-300 (leilao)
PTAX · R$ 5.0493 / US$ · 10/19/2026
Market estimates for guidance only, not a firm quote. Confirm the value with a broker/appraiser before any transaction.
Temporal identity
First flight
Aug 29, 1978
FAA cert.
Nov 06, 1981
ANAC cert.
—
Deliveries start
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Units produced
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The Mitsubishi MU-300 Diamond II is a light jet produced by Mitsubishi Heavy Industries between 1981 and 1986, a design that later gave rise to the Beechjet 400 and the Hawker 400 family. It has a range of 1,500 nm, a cruise speed of 458 kt and a maximum takeoff weight of 6,577 kg, with 7 seats in the typical configuration and up to 9 in total. This page has the spec sheet, the estimated operating cost per flight hour and the fleet registered in Brazil, with registrations and operators.
Detailed specs
Performance
- Fuel
- 730.2 gal
- Landing distance
- 2,750 ft
- Max operating altitude
- 41,000 ft
Cabin and comfort
- Typical configuration
- Club 4 + 2 Forward + Belted Lavatory
- Cabin volume
- 305 cu ft
Avionics and engines
- Engines
- 2× P&W JT15D-4 (2,500 lbf)
- APU
- No
- Flight deck
- Analog (original)
- Autopilot
- Yes
- Weather radar
- Yes
Operating costs
- Data source
- Aircraft Budget Analyzer, Beechcraft/Mitsubishi Diamond 1A FastFacts (2x JT15D-4D, 206.8 gph, TBO 3,500h, PAPI value ~$343k) · planephd.com, Mitsubishi Diamond 1A specifications/operating cost (172.5 gph cruise, 2 engines JT15D-4D) · aviacost.com, Beechcraft Hawker Beechjet 400A operating costs (variable ~$3,305/h, ~210 gph, $4,461/h all-in @ 325h) as light-jet sibling anchor · Jettly, Beechjet 400A operating costs (maint ~$850/h, engine reserve ~$630/h, JT15D-5) · Aircraft Bluebook + Controller.com listings 2024 (prior DOC: fuel $880/h, maintenance $520/h, DOC total $1,830/h)
- Last updated
- 2026
- Average pre-owned price
- US$ 350,000
- Reference fuel price
- US$ 6/gal
External dimensions
- Overall length
- 14.75 m
- Wingspan
- 13.26 m
- Height
- 4.19 m
Weights & fuel
- Operating empty weight (OEW)
- 4,127 kg
- Maximum takeoff weight (MTOW)
- 6,577 kg
- Fuel capacity
- 2,764 L
- Fuel capacity
- 4,948 lb
Minimum runway
RBAC 135.385 · landing within 60% of the runwaysea level / ISA referenceHow much runway the Diamond II MU-300 needs to dispatch: the manual figure and what the charter (RBAC 135) rule requires.
Charter (RBAC 135), dry runway
1,397m
landing ÷ 0.60 · RBAC 135.385(b)
Charter, wet runway
1,607m
× 1.15 · RBAC 135.385(d)
Takeoff or BFL, manual
1,201m
unfactored takeoff, manufacturer
Dispatches under charter rules at 239 of 465 Brazilian public runways when dry, and at 130 when wet.
Minimum runway
Where the Diamond II MU-300 dispatches under charter rules
Verdict per regime (private, charter dry and wet) across 465 Brazilian public runways, with the margin in meters.
Starter feature. Available on your Jet Tracker account.
Manufacturer-published distances at sea level, ISA and reference weight. Not corrected for altitude, temperature, wind or runway condition, takeoff included. Uses the declared LDA as a proxy for effective runway length (RBAC 135.361) and the most favourable threshold in calm air (135.385(b)(1)): on the day, wind may force the shorter threshold. Destination only: does not assess the alternate aerodrome (135.387). Not a substitute for the AFM or the operator's performance analysis. Rule: RBAC 135.385 and 135.398; private flying (RBAC 91) is not factored. Runways: declared distance (LDA) from AISWEB/DECEA (2026-09-05), checkable on each aerodrome chart; where DECEA publishes no declared distance, physical length from OurAirports is used.
Cabin
Standard configuration
1 zone7 typical passengers · 9 maxClub 42 forward-facingBelted lavatory (extra seat)
Typical factory configuration (curated data). The drawing below is schematic and at approximate scale; the actual layout varies by interior and year.
Cabin to scale: cross-section and profile
✗ no stand-up heightfront cross-section · person = 1.75 m
Length
4.72 m
Width
1.5 m
Height
1.45 m
Volume
305 cu ft
Baggage
—
History
- 1978First flight
- 1981 - First Japanese business jet
Developed by Mitsubishi Heavy Industries in Japan, first flight in August 1978 and FAA certification in November 1981. Production in San Angelo, Texas.
Wikipedia / Mitsubishi - 1981FAA certification
- 1985 - Sold to Beechcraft in 1985
Mitsubishi sold the program to Beech Aircraft in December 1985, which renamed the model the Beechjet 400, the direct origin of the 400/400A/400XP family.
Wikipedia / Beechcraft - 1986End of production
Brazil Fleet
Preliminary estimate, Beechjet predecessor.
Mitsubishi Diamond II MU-300 (1981-1986, ~95 units before Beechcraft acquired the line), minimal Brazilian fleet, estimated 1-2 operational aircraft. Direct predecessor of the Beechjet 400. Pre-owned market: US$ 300-700k.
Lineage
Model with no documented lineage in the manufacturer's line.
Curiosities and highlights
Limitations
Curiosities
JT15D engines at the origin
Equipped with the Pratt & Whitney Canada JT15D-5, the same engine family used in the Citation I/II, facilitating crossover of mechanics between fleets.
Frequently asked questions
How much does the Mitsubishi Diamond II MU-300 cost?
The Mitsubishi Diamond II MU-300 is out of production, so there is no factory price. On the used market the median is around US$ 375,000, varying with year and flight hours; see real listings on this model's Market tab. Reference value as of 06/2026.
What is the range of the Mitsubishi Diamond II MU-300?
The maximum range is 1500 nm (1,500 NM · 2,778 km).
How fast is the Mitsubishi Diamond II MU-300?
Cruise speed is 458 kt, equivalent to 848 km/h, or Mach 0.80.
How many passengers does the Mitsubishi Diamond II MU-300 seat?
The Mitsubishi Diamond II MU-300 seats up to 9 passengers, crew not included.
How much does it cost to operate the Mitsubishi Diamond II MU-300 per hour?
Jet Tracker estimate: about US$ 3,329 per flight hour at 400 h/year, of which US$ 2,593 per hour is variable cost (fuel, engine program, maintenance reserves) plus US$ 294,500 per year of fixed cost (crew, hangar, insurance), under Jet Tracker's default assumptions (Southeast Brazil, in-house crew, 400 h/year). Run your own scenario on this model's Costs tab.