Twin piston

N21SG

1976 Cessna 421C

Registered 1 NTSB/FAA record
Built
1976
Serial
421C0039
Class
Twin piston
Engines
2 × Continental GTSIO-520 series
Status
Current as of October 2026
Registered owner
Two One Sierra Golf LLC (LLC)
Based
Seattle, WA
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1976 Cessna 421C
Representative photo of a Cessna 421C. Not a photo of N21SG.
Registration record

N21SG on the FAA register

Type
1976 Cessna 421C
Serial
421C0039
Engines
2 × Continental GTSIO-520 series
Registered owner
Two One Sierra Golf LLC
Seattle, WA
Certificate issued
2012-09-18
Airworthiness date
1984-04-18
Registration expires
2028-09-30
Airworthiness class
Standard · normal
Mode S (hex)
A1B8C0
Mode S (octal)
50334300
Seats (type)
8
Weight class
up to 12,499 lb
Range (type)
1,197 nm
Cruise (type)
241 kt
Status
Current as of October 2026
Market asking range
$300,000 to $549,000
Middle half of 43 live Cessna 421C listings, 1976–1984 models (median $439,000). Asking prices, not an appraisal of N21SG.
Registry history

Timeline

  • 2028-09-30
    Registration expires (renewal due).
  • 2016-04-13
    Accident at Death Valley, CA; damage: substantial.
  • 2012-09-18
    Certificate of registration issued as N21SG.
  • 1984-04-18
    Airworthiness date on the current FAA record (standard category (normal)).
  • 1976
    Manufactured (1976).
Overview

About N21SG

N21SG is a 1976 Cessna 421C, serial number 421C0039. The FAA register lists Two One Sierra Golf LLC as the registrant in Seattle, Washington. The current certificate of registration was issued on September 18, 2012 and expires on September 30, 2028.

The FAA aircraft reference file describes the type as a twin piston, two Continental GTSIO-520 series engines and 8 seats. Published figures for the type give a cruise speed of about 241 knots and a range of about 1,197 nm; actual performance depends on configuration, load and conditions. Its airworthiness certificate is standard category (normal), dated April 18, 1984.

N21SG has 1 accident/incident record on file (most serious damage: substantial); details are below.

Cruise
241 kt
Range
1,197 nm
Power / thrust (each)
375
Takeoff over 50 ft
2,323 ft
Landing over 50 ft
2,293 ft
Fuel burn
47 gph

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

Safety record

Accident & incident history

2016-04-13 Accident · Death Valley, CA Damage: Substantial NTSB · WPR16LA092
Reported aircraft: Cessna 421C
Probable cause: A runway overrun for reasons that could not be determined based on the available information.

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

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Browse: Cessna aircraft for sale· Cessna 421C overview· Aircraft registered in Washington· 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.