Single-engine piston

N4221A

1991 Homebuilt Challenger II

Registered No accidents on file
Built
1991
Serial
CH201910612
Class
Single-engine piston
Engines
Ama/Expr UNKNOWN ENG
Status
Current as of October 2026
Registered owner
Individual · sign in to see
Based
Fennimore, WI
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Registration record

N4221A on the FAA register

Type
1991 Homebuilt Challenger II
Serial
CH201910612
Engines
Ama/Expr UNKNOWN ENG
Registered owner
Individual — the name of an individual registrant is shown to signed-in users. Sign in
Fennimore, WI
Certificate issued
1998-07-15
Airworthiness date
1991-11-18
Registration expires
2027-12-31
Airworthiness class
Experimental · amateur-built
Mode S (hex)
A50589
Mode S (octal)
51202611
Seats (type)
1
Weight class
up to 12,499 lb
Status
Current as of October 2026
Registry history

Timeline

  • 2027-12-31
    Registration expires (renewal due).
  • 1998-07-15
    Certificate of registration issued as N4221A to the current registrant.
  • 1991-11-18
    Airworthiness date on the current FAA record (experimental category (amateur-built)).
  • 1964-09-16
    N4221A previously assigned to a Grumman G-21A (s/n 1030); cancelled.
Overview

About N4221A

N4221A is a 1991 Homebuilt Challenger II, serial number CH201910612. It is registered to an individual in Fennimore, Wisconsin. The current certificate of registration was issued on July 15, 1998 and expires on December 31, 2027.

The FAA aircraft reference file describes the type as a single-engine piston, one Ama/Expr UNKNOWN ENG engine and 1 seats. Its airworthiness certificate is experimental category (amateur-built), dated November 18, 1991.

No NTSB accident or incident reports and no FAA preliminary notices are on file for this airframe as N4221A. 1 earlier record involves a different aircraft that carried the same N-number.

Safety record

Accident & incident history

1964-07-13 Accident · Avalon Calif, 05 Damage: Destroyed NTSB · 3 2054
Reported aircraft: Grumman G21A — a different aircraft that carried the N4221A registration before this airframe.

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 Wisconsin· 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.