Single-engine piston

N81259

Homebuilt Vans RV-4

Registered No accidents on file
Built
—
Serial
2034
Class
Single-engine piston
Engines
Lycoming O-320 series
Status
Current as of October 2026
Registered owner
Thermodynamic Sciences LLC (LLC)
Based
Irvington, AL
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Registration record

N81259 on the FAA register

Type
Homebuilt Vans RV-4
Serial
2034
Engines
Lycoming O-320 series
Registered owner
Thermodynamic Sciences LLC
Irvington, AL
Certificate issued
2021-09-20
Airworthiness date
1990-11-15
Registration expires
2028-09-30
Airworthiness class
Experimental · amateur-built
Mode S (hex)
AB13F3
Mode S (octal)
52611763
Seats (type)
2
Weight class
up to 12,499 lb
Status
Current as of October 2026
Registry history

Timeline

  • 2028-09-30
    Registration expires (renewal due).
  • 2021-09-20
    Certificate of registration issued as N81259 to the current registrant.
  • 1990-11-15
    Airworthiness date on the current FAA record (experimental category (amateur-built)).
  • 1947-09-11
    N81259 previously assigned to a Fairchild 24W-46 (s/n W46159); cancelled.
Overview

About N81259

N81259 is a Homebuilt Vans RV-4, serial number 2034. The FAA register lists Thermodynamic Sciences LLC as the registrant in Irvington, Alabama. The current certificate of registration was issued on September 20, 2021 and expires on September 30, 2028.

The FAA aircraft reference file describes the type as a single-engine piston, one Lycoming O-320 series engine and 2 seats. Its airworthiness certificate is experimental category (amateur-built), dated November 15, 1990.

No NTSB accident or incident reports and no FAA preliminary notices are on file for this airframe as N81259. 1 earlier record involves a different aircraft that carried the same N-number.

Safety record

Accident & incident history

1986-07-14 Accident · Benton Harbor, MI Damage: Destroyed Serious injury NTSB · CHI86FA170
Reported aircraft: Grumman AA5B — a different aircraft that carried the N81259 registration before this airframe.

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 Alabama· 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.