Single-engine piston

N104X

1970 Homebuilt Thorp T-18

Registered No accidents on file
Built
1970
Serial
624
Class
Single-engine piston
Engines
Lycoming O&VO-360 series
Status
Current as of October 2026
Registered owner
Leider Robert G + 1 co-owner (Partnership)
Based
Washoe Valley, NV
Registration record

N104X on the FAA register

Type
1970 Homebuilt Thorp T-18
Serial
624
Engines
Lycoming O&VO-360 series
Registered owner
Leider Robert G + 1 co-owner
Washoe Valley, NV
Certificate issued
2021-11-20
Airworthiness date
1979-12-10
Registration expires
2028-11-30
Airworthiness class
Experimental · amateur-built
Mode S (hex)
A0159D
Mode S (octal)
50012635
Seats (type)
2
Weight class
up to 12,499 lb
Status
Current as of October 2026
Registry history

Timeline

  • 2028-11-30
    Registration expires (renewal due).
  • 2021-11-20
    Certificate of registration issued as N104X to the current registrant.
  • 1979-12-10
    Airworthiness date on the current FAA record (experimental category (amateur-built)).
  • 1970
    Manufactured (1970).
  • 1969-07-29
    N104X previously assigned to a Beechcraft Bonanza 35 (s/n D-743); cancelled.
Overview

About N104X

N104X is a 1970 Homebuilt Thorp T-18, serial number 624. The FAA register lists Leider Robert G + 1 co-owner as the registrant in Washoe Valley, Nevada. The current certificate of registration was issued on November 20, 2021 and expires on November 30, 2028.

The FAA aircraft reference file describes the type as a single-engine piston, one Lycoming O&VO-360 series engine and 2 seats. Its airworthiness certificate is experimental category (amateur-built), dated December 10, 1979.

No NTSB accident or incident reports and no FAA preliminary notices are on file for this airframe as N104X. 1 earlier record involves a different aircraft that carried the same N-number.

Safety record

Accident & incident history

1969-03-16 Accident · Bishop,Calif, 05 Damage: Destroyed NTSB · 3 1040
Reported aircraft: Beechcraft 35 — a different aircraft that carried the N104X registration before this airframe.
Probable cause: ED A FORMING SIERRA WAVE.

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 Nevada· 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.