Single-engine piston

N439DS

Homebuilt Acro Sport II

Registered No accidents on file
Built
—
Serial
1744
Class
Single-engine piston
Engines
Lycoming O-320-E2G
Status
Current as of October 2026
Registered owner
Individual · sign in to see
Based
Troy, OH
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Registration record

N439DS on the FAA register

Type
Homebuilt Acro Sport II
Serial
1744
Engines
Lycoming O-320-E2G
Registered owner
Individual — the name of an individual registrant is shown to signed-in users. Sign in
Troy, OH
Certificate issued
2023-09-06
Airworthiness date
2007-10-20
Registration expires
2030-09-30
Airworthiness class
Experimental · amateur-built
Mode S (hex)
A544E9
Mode S (octal)
51242351
Seats (type)
2
Weight class
up to 12,499 lb
Status
Current as of October 2026
Registry history

Timeline

  • 2030-09-30
    Registration expires (renewal due).
  • 2023-09-06
    Certificate of registration issued as N439DS to the current registrant.
  • 2007-10-20
    Airworthiness date on the current FAA record (experimental category (amateur-built)).
  • 2000-11-02
    N439DS previously assigned to a Sikorsky S-58BT (s/n 58658); cancelled.
Overview

About N439DS

N439DS is a Homebuilt Acro Sport II, serial number 1744. It is registered to an individual in Troy, Ohio. The current certificate of registration was issued on September 6, 2023 and expires on September 30, 2030.

The FAA aircraft reference file describes the type as a single-engine piston, one Lycoming O-320-E2G engine and 2 seats. Its airworthiness certificate is experimental category (amateur-built), dated October 20, 2007.

No NTSB accident or incident reports and no FAA preliminary notices are on file for this airframe as N439DS. 1 earlier record involves a different aircraft that carried the same N-number.

Safety record

Accident & incident history

1990-07-16 Accident · Ovando, MT Damage: Substantial NTSB · SEA90LA137
Reported aircraft: Sikorsky S-58BT — a different aircraft that carried the N439DS registration before this airframe.
Probable cause: THE PILOT DID NOT MAINTAIN ROTOR RPM AFTER A COMPRESSOR ASSEMBLY BLADE FAILURE. A RELATED FACTOR WAS AN INADEQUATE AUTOROTATION RESULTING IN A HARD LANDING.

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 Ohio· 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.