Single-engine piston

N21BJ

Homebuilt B.J Sportster

Registered No accidents on file
Built
—
Serial
001
Class
Single-engine piston
Engines
Franklin 4AC199D&E series
Status
Current as of October 2026
Registered owner
Seven M Enterprises (Partnership)
Based
Kalispell, MT
Registration record

N21BJ on the FAA register

Type
Homebuilt B.J Sportster
Serial
001
Engines
Franklin 4AC199D&E series
Registered owner
Seven M Enterprises
Kalispell, MT
Certificate issued
2023-08-08
Airworthiness date
1977-07-19
Registration expires
2030-08-31
Airworthiness class
Experimental · amateur-built
Mode S (hex)
A1B74B
Mode S (octal)
50333513
Seats (type)
1
Weight class
up to 12,499 lb
Status
Current as of October 2026
Registry history

Timeline

  • 2030-08-31
    Registration expires (renewal due).
  • 2023-08-08
    Certificate of registration issued as N21BJ.
  • 1977-07-19
    Airworthiness date on the current FAA record (experimental category (amateur-built)).
Overview

About N21BJ

N21BJ is a Homebuilt B.J Sportster, serial number 001. The FAA register lists Seven M Enterprises as the registrant in Kalispell, Montana. The current certificate of registration was issued on August 8, 2023 and expires on August 31, 2030.

The FAA aircraft reference file describes the type as a single-engine piston, one Franklin 4AC199D&E series engine and 1 seats. Its airworthiness certificate is experimental category (amateur-built), dated July 19, 1977.

No NTSB accident or incident reports and no FAA preliminary notices are on file for N21BJ.

Safety record

Accident & incident history

✓ No NTSB accident or incident reports and no FAA preliminary notices on file for N21BJ.

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

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Browse: Aircraft registered in Montana· 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.