Single-engine piston

N81TR

Homebuilt IRBD-4

Registered No accidents on file
Built
—
Serial
009
Class
Single-engine piston
Engines
Lycoming IO 540 series
Status
Current as of October 2026
Registered owner
Individual · sign in to see
Based
Bigfork, MT
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Registration record

N81TR on the FAA register

Type
Homebuilt IRBD-4
Serial
009
Engines
Lycoming IO 540 series
Registered owner
Individual — the name of an individual registrant is shown to signed-in users. Sign in
Bigfork, MT
Certificate issued
2021-12-09
Airworthiness date
2010-12-10
Registration expires
2028-12-31
Airworthiness class
Experimental · amateur-built
Mode S (hex)
AB08BC
Mode S (octal)
52604274
Seats (type)
2
Weight class
up to 12,499 lb
Status
Current as of October 2026
Registry history

Timeline

  • 2028-12-31
    Registration expires (renewal due).
  • 2021-12-09
    Certificate of registration issued as N81TR to the current registrant.
  • 2010-12-10
    Airworthiness date on the current FAA record (experimental category (amateur-built)).
  • 2005-03-09
    N81TR previously assigned to a Homebuilt Team Rocket F-1 (s/n 049); cancelled.
  • 1993-02-09
    N81TR previously assigned to a Commander 690C (s/n 11690); cancelled.
Overview

About N81TR

N81TR is a Homebuilt IRBD-4, serial number 009. It is registered to an individual in Bigfork, Montana. The current certificate of registration was issued on December 9, 2021 and expires on December 31, 2028.

The FAA aircraft reference file describes the type as a single-engine piston, one Lycoming IO 540 series engine and 2 seats. Its airworthiness certificate is experimental category (amateur-built), dated December 10, 2010.

No NTSB accident or incident reports and no FAA preliminary notices are on file for this airframe as N81TR. 2 earlier records involve a different aircraft that carried the same N-number.

Safety record

Accident & incident history

1992-12-23 Accident · Golden, CO Damage: Destroyed Fatal injury NTSB · DEN93FA017
Reported aircraft: Rockwell 690C — a different aircraft that carried the N81TR registration before this airframe.
Probable cause: THE PILOT FLYING THE AIRCRAFT BEYOND THE DESIGN MANEUVERING SPEED AND EXCEEDING THE DESIGN STRESS LIMITS. A FACTOR WAS: CLEAR AIR TURBULENCE.
1991-05-24 Incident · Denver, CO NTSB · DEN91IA076
Reported aircraft: Aero Commander 690C — a different aircraft that carried the N81TR registration before this airframe.
Probable cause: FATIGUE FAILURE OF FLAP CABLE.

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 Montana· 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.