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1965 Learjet 23Jet Aircraft • USA

This 1965 Learjet 23, registration N477K, is presented as the only FAA Stage 3 Noise Regulation-compliant and airworthy Learjet 23 in the world. With a total airframe time of 5,526 hours and 5,100 landings, it has undergone comprehensive maintenance, including the completion of all A, B, C, D, and 12-year airframe inspections, along with 5-year engine corrosion inspections, in June 2025. Its General Electric CJ610-4 engines are fitted with hush kits; the left engine has 1,939 hours remaining until overhaul and 649 until its next hot section, while the right has 2,075 hours to overhaul and 105 to hot section. The aircraft is IFR-capable and...

Year
1965
Make
Learjet
Series
23
Model
23
Tail #
N477K
Serial #
23-036

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Specifications

Category
Jet
Intended Use
Business, Passenger
Flight Rules
VFR & IFR
Useful Load
5,310 lbs
Seats
8

Hours, Logs & Inspections

Total Time
5,527 hrs
Engine 1 Time
3,062 hrs (SMOH)
Engine 2 Time
2,926 hrs (SMOH)
Prop 1 Time
352 hrs
Prop 2 Time
896 hrs
Inspection Status
12-year airframe inspections completed at Trine Aerospace in June 2025. 5-year engine corrosion inspections completed by Excel Turbines in June 2025. All Airworthiness Directives are current. FAR 91.411 Certification completed in June 2025. FAR 91.413 Certification completed in March 2025. Major landing gear Inspection due in 897 landings.

Avionics

GPS

Garmin GNS 530 - GNS with TAWS

ADSB

Garmin GTX-335 - ADS-B-Out

Weather

TAWS

Additional Equipment

Hush Kits

FAA-approved Stage 3-compliant hush kits

RVSM

Avcon RVSM

Oxygen System

EROS - EROS oxygen masks installed in June 2025

RVSM Certification

Avcon RVSM - RVSM STC

Emergency Locator Transmitter

ELT battery replaced in June 2025

Tires

New tires installed in June 2025

Batteries

Main batteries replaced in June 2025

Emergency Power Supply

New emergency power supply in June 2025

Hoses

New Teflon/stainless fuel, air and hydraulic hoses in June 2025

Flapper Valves

New flapper valves in June 2025

Interior & Exterior

Interior Rating
8/10
Interior Year
1999
Paint Rating
8/10
Paint Year
2000
Interior Notes
New interior in 1999. Seems to have the original passenger seat frames (mid-century, high-backed). Room for six passengers and two pilots.
Exterior Notes
Painted in 2000.

Engine & Propeller

Engine Type
Jet
Engine Count
2
Engine Model
CJ610-4

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Aircraft Location

USA

Listing Details

Used
For Sale

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First Seen: Oct 1, 2025

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