Single-engine piston

N421BF

2025 Homebuilt S21 Outback

Registered No accidents on file
Built
2025
Serial
03240374
Class
Single-engine piston
Engines
Titan IO-340
Status
Current as of October 2026
Registered owner
Individual · sign in to see
Based
Sioux Falls, SD
Registration record

N421BF on the FAA register

Type
2025 Homebuilt S21 Outback
Serial
03240374
Engines
Titan IO-340
Registered owner
Individual — the name of an individual registrant is shown to signed-in users. Sign in
Sioux Falls, SD
Certificate issued
2025-07-23
Airworthiness date
2025-09-10
Registration expires
2032-07-31
Airworthiness class
Experimental · amateur-built
Mode S (hex)
A4FF75
Mode S (octal)
51177565
Seats (type)
2
Weight class
up to 12,499 lb
Kit
Rans Designs Inc S-21 OUTBOUND
Status
Current as of October 2026
Registry history

Timeline

  • 2032-07-31
    Registration expires (renewal due).
  • 2025-09-10
    Airworthiness date on the current FAA record (experimental category (amateur-built)).
  • 2025-07-23
    Certificate of registration issued as N421BF to the current registrant.
  • 2009-04-09
    N421BF previously assigned to a Cessna 421A (s/n 421A0055); cancelled.
Overview

About N421BF

N421BF is a 2025 Homebuilt S21 Outback, serial number 03240374. It is registered to an individual in Sioux Falls, South Dakota. The current certificate of registration was issued on July 23, 2025 and expires on July 31, 2032.

The FAA aircraft reference file describes the type as a single-engine piston, one Titan IO-340 engine and 2 seats. Its airworthiness certificate is experimental category (amateur-built), dated September 10, 2025.

No NTSB accident or incident reports and no FAA preliminary notices are on file for N421BF.

Safety record

Accident & incident history

✓ No NTSB accident or incident reports and no FAA preliminary notices on file for N421BF.

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

Same state

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Browse: Aircraft registered in South Dakota· 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.