Single-engine piston

N5089Q

2008 Homebuilt CX-4

Registered 1 NTSB/FAA record
Built
2008
Serial
95
Class
Single-engine piston
Engines
Ama/Expr UNKNOWN ENG
Status
Current as of October 2026
Registered owner
Siefkes Siegfried H + 1 co-owner (Partnership)
Based
Baker City, OR
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Registration record

N5089Q on the FAA register

Type
2008 Homebuilt CX-4
Serial
95
Engines
Ama/Expr UNKNOWN ENG
Registered owner
Siefkes Siegfried H + 1 co-owner
Baker City, OR
Certificate issued
2023-05-22
Airworthiness date
2008-04-01
Registration expires
2030-05-31
Airworthiness class
Experimental · amateur-built
Mode S (hex)
A65B4A
Mode S (octal)
51455512
Seats (type)
1
Weight class
up to 12,499 lb
Status
Current as of October 2026
Registry history

Timeline

  • 2030-05-31
    Registration expires (renewal due).
  • 2023-05-22
    Certificate of registration issued as N5089Q to the current registrant.
  • 2011-11-09
    Accident at San Carlos, AZ; damage: substantial.
  • 2008-04-01
    Airworthiness date on the current FAA record (experimental category (amateur-built)).
  • 2003-02-13
    N5089Q previously assigned to a Bell UH-1E (s/n 155351); cancelled.
Overview

About N5089Q

N5089Q is a 2008 Homebuilt CX-4, serial number 95. The FAA register lists Siefkes Siegfried H + 1 co-owner as the registrant in Baker City, Oregon. The current certificate of registration was issued on May 22, 2023 and expires on May 31, 2030.

The FAA aircraft reference file describes the type as a single-engine piston, one Ama/Expr UNKNOWN ENG engine and 1 seats. Its airworthiness certificate is experimental category (amateur-built), dated April 1, 2008.

N5089Q has 1 accident/incident record on file (most serious damage: substantial); details are below.

Safety record

Accident & incident history

2011-11-09 Accident · San Carlos, AZ Damage: Substantial NTSB · WPR12CA033
Reported aircraft: Casler Scott CX-4
Probable cause: The pilot's inadequate directional control during takeoff.

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 Oregon· 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.