Twin piston

N421KS

1973 Cessna 421B

Registered 1 NTSB/FAA record
Built
1973
Serial
421B0507
Class
Twin piston
Engines
2 × Continental GTSIO-520-C
Status
Current as of October 2026
Registered owner
Environmental Manufacturing Solutions Ltd (Corporation)
Based
Melbourne, FL
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1973 Cessna 421B
Representative photo of a Cessna 421B. Not a photo of N421KS.
Registration record

N421KS on the FAA register

Type
1973 Cessna 421B
Serial
421B0507
Engines
2 × Continental GTSIO-520-C
Registered owner
Environmental Manufacturing Solutions Ltd
Melbourne, FL
Certificate issued
2016-12-14
Airworthiness date
1973-11-03
Registration expires
2029-12-31
Airworthiness class
Standard · normal
Mode S (hex)
A50048
Mode S (octal)
51200110
Seats (type)
8
Weight class
up to 12,499 lb
Range (type)
845 nm
Cruise (type)
235 kt
Status
Current as of October 2026
Market asking range
$219,000 to $389,000
Middle half of 15 live Cessna 421B listings, 1971–1975 models (median $339,000). Asking prices, not an appraisal of N421KS.
Registry history

Timeline

  • 2029-12-31
    Registration expires (renewal due).
  • 2016-12-14
    Certificate of registration issued as N421KS.
  • 2004-07-02
    Accident at Portland, ME; damage: substantial.
  • 1973-11-03
    Airworthiness date on the current FAA record (standard category (normal)).
Overview

About N421KS

N421KS is a 1973 Cessna 421B, serial number 421B0507. The FAA register lists Environmental Manufacturing Solutions Ltd as the registrant in Melbourne, Florida. The current certificate of registration was issued on December 14, 2016 and expires on December 31, 2029.

The FAA aircraft reference file describes the type as a twin piston, two Continental GTSIO-520-C engines and 8 seats. Published figures for the type give a cruise speed of about 235 knots and a range of about 845 nm; actual performance depends on configuration, load and conditions. Its airworthiness certificate is standard category (normal), dated November 3, 1973.

N421KS has 1 accident/incident record on file (most serious damage: substantial); details are below.

Cruise
235 kt
Range
845 nm
Power / thrust (each)
375
Takeoff over 50 ft
2,387 ft
Landing over 50 ft
2,178 ft
Fuel burn
47 gph

Published figures for the Cessna 421B type. They describe the model, not this airframe's equipment or condition. Cessna 421B specs, prices and for-sale inventory →

Safety record

Accident & incident history

2004-07-02 Accident · Portland, ME Damage: Substantial NTSB · IAD04LA029
Reported aircraft: Cessna 421B
Probable cause: Failure of the right main landing gear down-lock mechanism resulting in the collapse of the right main landing gear.

Sources: NTSB aviation accident database and CAROL case system, FAA preliminary accident & incident notices. Search accident records

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All 21,712 aircraft registered in Florida →
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Browse: Cessna aircraft for sale· Cessna 421B overview· Aircraft registered in Florida· Registry by state· FAA registry stats

Data: FAA Aircraft Registry (October 2026), including deregistered aircraft; NTSB and FAA accident data; fyiAero listing history. Individual owners' names are shown to signed-in users and street addresses are never shown. Type figures are published specifications, not this aircraft's.