Single-engine piston

N421SD

Homebuilt SLING TSI

Registered No accidents on file

Built

—

Serial

422SK

Class

Single-engine piston

Engines

Status

Current as of October 2026

Registered owner

Individual · sign in to see

Based

Manhattan Beach, CA

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Registration record

N421SD on the FAA register

Type

Homebuilt SLING TSI

Serial

422SK

Engines

Registered owner

Individual — the name of an individual registrant is shown to signed-in users. Sign in

Manhattan Beach, CA

Certificate issued

2026-06-16

Airworthiness date

—

Registration expires

2033-06-30

Airworthiness class

—

Mode S (hex)

A500EA

Mode S (octal)

51200352

Seats (type)

Weight class

up to 12,499 lb

Kit

Airplane Factory Inc SLING TSI

Status

Current as of October 2026

Registry history

Timeline

2033-06-30
Registration expires (renewal due).
2026-06-16
Certificate of registration issued as N421SD to the current registrant.
2017-10-31
N421SD previously assigned to a Cessna 421B (s/n 421B0127); cancelled.
2005-03-21
N421SD previously assigned to a Cessna 421B (s/n 421B0386); cancelled.

Overview

About N421SD

N421SD is a Homebuilt SLING TSI, serial number 422SK. It is registered to an individual in Manhattan Beach, California. The current certificate of registration was issued on June 16, 2026 and expires on June 30, 2033.

The FAA aircraft reference file describes the type as a single-engine piston and 4 seats.

No NTSB accident or incident reports and no FAA preliminary notices are on file for this airframe as N421SD. 1 earlier record involves a different aircraft that carried the same N-number.

Safety record

Accident & incident history

2004-12-02 Accident · Apison, TN Damage: Destroyed Fatal injury NTSB · ATL05FA032

Reported aircraft: Cessna 421B — a different aircraft that carried the N421SD registration before this airframe.

Probable cause: The pilot's improper identification of a partial loss of engine power on initial takeoff climb resulting in a collision with trees and the ground. A factor was a partial failure of the left engine starter adapter due to overload.

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

Same state

Other aircraft registered in California

1968 Cessna 421 Golden Eagle

N421SL

2006 Schleicher ASK-21

N421SW

1969 Beechcraft E33A Bonanza

N421TV

1982 Cessna 421C

All 27,686 aircraft registered in California →

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Browse: Aircraft registered in California· 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.