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1977 Cessna 421CMulti-Engine Piston Aircraft • Conroe, TX, USA

This 1977 Cessna 421C, registration N90MK, is a pressurized piston twin based at CXO in Montgomery, Texas, and offered at $224,998. The airframe shows 4,726.5 total hours, with complete logs and a current annual completed in February 2026; the seller notes the aircraft is airworthy and still in use, so hours will change slightly. It is equipped for IFR flight and certified for flight into known icing, with a 234-gallon fuel capacity including an auxiliary fuel tank.

Power comes from a pair of turbocharged Continental GTSIO520 engines rated at 375 horsepower each. Both engines show 1,428 hours since major overhaul against a 1,600-hour TBO,...

Year
1977
Make
Cessna
Series
421 Golden Eagle
Model
421C
Tail #
N90MK
Serial #
Not Listed

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Specifications

Category
Multi-Engine Piston
Intended Use
Business, Passenger
Flight Rules
IFR

Hours, Logs & Inspections

Total Time
4,726.5 hrs
Engine 1 Time
1,428 hrs (SMOH)
Engine 2 Time
1,428 hrs (SMOH)
Prop 1 Time
620 hrs (SMOH)
Prop 2 Time
620 hrs (SMOH)
Logbook Status
Complete Logs
Inspection Status
Annual Complete: 2/26

Avionics

GPS

Garmin GNS 430W

ADSB

Garmin GTX 325

EMS

JPI Engine Monitor

MFD

Apollo MX20

Additional Equipment

Air Conditioning

Factory Air

Auxiliary Fuel Tank

Vortex Generators

Pressurization

Pressurized

Oxygen System

Flight Into Known Icing

Flight Into Known Icing (FIKI)

Propeller Sync

Props Sync

Interior & Exterior

Exterior Notes
Paint touch up done in 2026

Engine & Propeller

Engine Type
Piston
Engine Count
2
Engine Make
Continental
Engine Model
GTSIO520
Engine Power
375 HP
Propeller Model
McCauley 3-Blade Aluminum

Asking Price

$224,998

Aircraft Location

Conroe, TX, USA

Listing Details

Used
For Sale

Price History

Sep 19, 2026: $224,998(-$15,001) - controller

Jul 1, 2026: $239,999(-$16,000) - trade-a-plane

Jun 10, 2026: $255,999(-$4,000) - trade-a-plane

+1 more price changes

Contact Seller

First Seen: Jun 2, 2026

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Asking Price

$224,998