N121MJ 1984 Cessna Citation II
- 1984Built
- 8Seats
- 1,903 nmRange
- 369 ktCruise
- 43,000 ftCeiling
INSIDE
The Cessna Citation II cabin.
Illustrations of a typical Cessna Citation II cabin, not N121MJ’s. Every aircraft’s completion differs.
RADAR ESTIMATE
What N121MJ is worth, and where it’s heading.
Radar's value model doesn't cover the Cessna Citation II on its own yet, so this borrows the Embraer Phenom 300/300E curve, scales it to N121MJ's listing-based estimate and widens the range to match. An estimate, not an appraisal.
N121MJ · On program · wider range
$700K
- In 2031
- $478K
- Value kept
- 68%
- Per year
- −7.3%
- Program effect
- $39.6K
- Confidence
- Low
5-year projection
The Embraer Phenom 300/300E curve, scaled to this Cessna Citation II
SPECIFICATIONS
Cessna Citation II specs
Published figures for the type, from public sources. A given aircraft varies with its completion, weight and mods.
- Model
- Cessna Citation II
- Year
- 1984
- Serial number
- 550-0489
- Engines
- 2 × Pratt & Whitney Canada JT15D-4
- Thrust
- 2,500 lbf each
- Seats
- Up to 8
- Range
- 1,903 nm
- Cruise
- 369 ktas
- Published Mach
- 0.7
- Ceiling
- 43,000 ft
- Fuel capacity
- 742 US gal
- ICAO type
- C550
THE AIRCRAFT’S LIFE
N121MJ, from delivery to today.
Registration events from FAA records, compiled November 2025. Maintenance, damage and component history live in the logbooks, not the registry.
-
Sierra Sierra Enterprises
Aircraft registered as N489SS (MSN 550-0489) to Sierra Sierra Enterprises (re-registration entry).
FAA registry -
U.S. Marshals Service
Sealed-bid sale listed (forfeited aircraft) with viewing/sale event reported April 28, 2014.
FAA registry -
Ial Corp
FAA certificate issued showing registration to IAL CORP (current registrant).
FAA registry -
Ial Corp
Most recent FAA registration action / update recorded for IAL CORP registration.
FAA registry
FAA REGISTRATION
Registration details
- Registration
- N121MJ
- Status
- Current as of November 2025
- Certificate issued
- Aug 7, 2017
- Airworthiness date
- Mar 27, 1989
- Last FAA action
- Dec 7, 2024
- Registration expires
- Aug 31, 2027
- Mode S code (hex)
- A05885
- Aircraft category
- Fixed-wing multi-engine
- Weight class
- 12,500 to 20,000lbs
From FAA registry data as of November 2025. Check the FAA registry for the current record.
OWNERSHIP
Registered owner
Ial Corp
EQUIPMENT AND HISTORY
As reported in public sources
- Avionics
- Original Collins/Sperry-era analog suite typical of early Citation IIs; specific current avionics fit for N121MJ not publicly listed
- Cabin
- Typical executive 7-8 place club/forward-club layout (exact on-airframe configuration not publicly listed)
Listings and registries are not the logbooks. A pre-buy confirms equipment, program status and damage history from the records themselves.
RESEARCH NOTES
About N121MJ
Compiled with AI assistance from the public sources listed below, November 2025. Not checked against the aircraft's logbooks.
Overview
The airframe bearing registration N121MJ is a 1984-built Cessna 550 Citation II, serial number 550-0489, manufactured by Cessna (Textron Aviation). The airframe is recorded as owned by Ial Corp, a corporation based in Lewes, DE, US, and is operated under United States registration. Condition highlights indicate a mature executive light jet with original-era systems and a typical maintenance profile for early Citation IIs.
Operations & Cabin
The cabin for N121MJ follows the typical executive Citation II arrangement, a 7-8 place club/forward-club layout, although the exact on-airframe configuration is not publicly listed; seating capacity is reported as 8. Avionics aboard this airframe are described as the original Collins/Sperry-era analog suite typical of early Citation IIs, with the specific current avionics fit for N121MJ not publicly listed. Operationally, this airframe is suited to short to mid-range executive missions within its 1,903 nm range and cruise speed near 369 kts, and would typically be based from the owner/operator’s local region around Lewes, DE for corporate travel. Maintenance considerations for this aircraft center on systems aging and potential avionics modernization if changes are desired by the operator.
Model & Market Context
The Cessna 550 Citation II occupies the light business jet niche for 1980s designs, offering modest speed, range and cabin comfort for owner-operators and small charter firms. Competing models historically include other light jets of the era with similar capacities and performance; buyer demand often hinges on airframe condition, engine life, and avionics state.
SOURCES
Where this page comes from
Built from FAA registry records, manufacturer specifications, and public flight-tracking and market data, compiled November 2025. Values come from Radar’s aircraft value model. Owners and operators can ask for a correction or removal.
BUYING, SELLING OR FINANCING
What to check before a deal
- Pre-buy records reviewWhat to read in the logbooks before you sign
- Aircraft title searchLiens, registrations and the chain of title
- Aircraft valuationHow records, time and programs move the price
- Aircraft maintenance recordsWhat a complete records package holds
Own or manage N121MJ? Put its logbooks in Radar.
Radar reads every logbook page, typed or handwritten, and builds one searchable record for the aircraft: times, inspections, ADs and components, each tied to the page it came from.
N121MJ is not a Radar customer record. This page is built from public sources as of November 2025. Owners and operators can ask for a correction or removal.