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1978 Cessna 421CMulti-Engine Piston Aircraft • Palatine, IL, USA

This 1978 Cessna 421C, registered as N123NP, presents a well-equipped piston twin with a recent major panel upgrade and low-time engines. The airframe has 6,484 hours total time, and each Continental GTSIO520L engine has 788 hours since major overhaul (SMOH) against a 1,600-hour TBO, with the McCauley propellers showing matching times. The aircraft is notably compliant for modern airspace with ADS-B and WAAS capability, and its primary mission is enhanced by known ice protection and a vortex generator installation.

The avionics suite is a significant feature, centered on dual Garmin GTN-750Xi navigators and dual Garmin GI-275 electronic...

Year
1978
Make
Cessna
Series
421 Golden Eagle
Model
421C
Tail #
N123NP
Serial #
402

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Specifications

Category
Multi-Engine Piston
Intended Use
Business, Passenger
Seats
7

Hours, Logs & Inspections

Total Time
6,484 hrs
Engine 1 Time
788 hrs (SMOH)
Engine 2 Time
788 hrs (SMOH)
Prop 1 Time
788 hrs (SMOH)
Prop 2 Time
788 hrs (SMOH)

Avionics

GPS

Garmin GTN-750Xi - Dual WAAS, Dual WAAS GPS Antennas

PFD

Garmin GI-275 - Dual Installed on Pilot and Co-Pilot Sides

AP

Garmin GFC-600 - Autopilot

Audio

Garmin GMA-35C - Audio Panel

ADSB

Garmin GTX-345 - Transponder, ADS-B Compliant

Additional Equipment

Ice Protection

Known Ice

Wheels and Brakes

Cleveland Wheels and Brakes

Vortex Generator

Spoiler/Speed Brake

Windshield

New Co-Pilot Windshields, Glass Windshield

Headsets

Bose Headsets

Battery

Lead Acid Battery

Fire Detection

Engine Fire Detection

Data Transfer

Garmin Flight Stream 510

Interior & Exterior

Interior Year
2024
Interior Notes
Seven Passenger Interior Consisting of Four-place Club Configuration, Single Aft Forward Facing Seat and Two Crew Seats. Dual Executive Writing Tables. New Interior 2024.
Exterior Notes
Overall White with Silver and Blue Stripes.

Engine & Propeller

Engine Type
Piston
Engine Count
2
Engine Make
CONTINENTAL
Engine Model
GTSIO520L
Propeller Model
MCCAULEY

Asking Price

$424,500

Aircraft Location

Palatine, IL, USA

Listing Details

Used
For Sale

Price History

Jan 20, 2026: $424,500(-$50,400) - controller

Jun 26, 2025: $474,900(+$25,900) - aso

Apr 20, 2025: $449,000 - controller

Contact Seller

First Seen: Apr 20, 2025

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Asking Price

$424,500