Single-engine piston

N646MA

2005 Flight Design CTSW

Registered 1 NTSB/FAA record
Built
2005
Serial
05-11-07
Class
Single-engine piston
Engines
Rotax SEE BOMBADIER
Status
Current as of October 2026
Registered owner
Ken Graham Phd Inc (Corporation)
Based
Sioux Falls, SD
Registration record

N646MA on the FAA register

Type
2005 Flight Design CTSW
Serial
05-11-07
Engines
Rotax SEE BOMBADIER
Registered owner
Ken Graham Phd Inc
Sioux Falls, SD
Certificate issued
2024-01-09
Airworthiness date
2006-01-12
Registration expires
2031-01-31
Airworthiness class
Light sport · airplane
Mode S (hex)
A87C99
Mode S (octal)
52076231
Seats (type)
2
Weight class
up to 12,499 lb
Status
Current as of October 2026
Registry history

Timeline

  • 2031-01-31
    Registration expires (renewal due).
  • 2025-07-05
    Accident at Joliet, IL; damage: substantial.
  • 2024-01-09
    Certificate of registration issued as N646MA to the current registrant.
  • 2006-01-12
    Airworthiness date on the current FAA record (light sport category (airplane)).
  • 2005
    Manufactured (2005).
  • 1980-10-02
    N646MA previously assigned to a Piper Turbo Aztec F / Turbo Aztec E / Aztec B (s/n 27-3255); cancelled.
Overview

About N646MA

N646MA is a 2005 Flight Design CTSW, serial number 05-11-07. The FAA register lists Ken Graham Phd Inc as the registrant in Sioux Falls, South Dakota. The current certificate of registration was issued on January 9, 2024 and expires on January 31, 2031.

The FAA aircraft reference file describes the type as a single-engine piston, one Rotax SEE BOMBADIER engine and 2 seats. Its airworthiness certificate is light sport category (airplane), dated January 12, 2006.

N646MA has 1 accident/incident record on file (most serious damage: substantial); details are below. 1 earlier record involves a different aircraft that carried the same N-number.

Safety record

Accident & incident history

2025-07-05 Accident · Joliet, IL Damage: Substantial NTSB · CEN25LA238
Reported aircraft: Flight Design CTSW
Probable cause: The pilot s failure to maintain directional control during the crosswind landing.
NTSB report ↗
1980-06-04 Accident · Neptune,Nj, 30 Damage: Destroyed Fatal injury NTSB · 3 0854
Reported aircraft: Piper PA-23 — a different aircraft that carried the N646MA registration before this airframe.
Probable cause: O HOUSE.HIT PWR LINES,THEN HOUSE.UNAUTH USE.

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 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.