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eFlight RegistryFAA data, updated daily
Maker · data as of September 25, 2026

Sieberts John

3 aircraft on the U.S. register. The most recent registration was July 30, 2025.

Models

SONEX1SERIES 71FIRESTAR II1

States

Tennessee1Oregon1Indiana1

Registrations by year

00011120201202312025

Aircraft newest first

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N44SX Sieberts John
SONEX
Fixed-wing, single engine Individual owner
Indiana
Experimental 2025-07-30 Valid
N78KF Sieberts John
FIRESTAR II
Fixed-wing, single engine Individual owner
Tennessee
Experimental 2023-02-22 Valid
N877JS Sieberts John
SERIES 7
Fixed-wing, single engine Northwest Steel LLC
Milton Freewater, Oregon
Experimental 2020-01-30 Valid